$ambc 2019 Q2 10-Q

Concept	2019 Q2	2018 Q2
Revenue	$89.00M	$150.6M
YoY Change	-40.92%	76.89%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$2.200M
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$226.3M	$23.50M
YoY Change	862.98%	-30.27%
% of Gross Profit
Operating Expenses	$121.9M	$81.90M
YoY Change	48.84%	-37.43%
Operating Profit
YoY Change
Interest Expense	-$67.40M	-$62.40M
YoY Change	8.01%	121.28%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	-$57.00M	$13.10M
YoY Change	-534.98%	-6.35%
Income Tax	$28.00M	$1.995M
% Of Pretax Income		15.22%
Net Earnings	-$128.0M	$4.000M
YoY Change	-3300.0%	-43.74%
Net Earnings / Revenue	-143.82%	2.66%
Basic Earnings Per Share	-$2.79	$0.09
Diluted Earnings Per Share	-$2.79	$0.09
COMMON SHARES
Basic Shares Outstanding	45.99M shares	45.68M shares
Diluted Shares Outstanding	45.99M shares	46.47M shares

Concept	2019 Q2	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$18.00M	$44.40M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$27.00M
YoY Change
Goodwill
YoY Change
Intangibles	$454.8M
YoY Change
Long-Term Investments	$42.88M	$37.50M
YoY Change	14.34%	15.67%
Other Assets	$29.00M	$1.000M
YoY Change	2800.0%	-80.0%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$14.71B	$21.54B
YoY Change	-31.68%	-6.39%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$437.0M	$238.0M
YoY Change	83.61%	-40.35%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$437.0M	$255.0M
YoY Change	71.37%	-40.84%
LONG-TERM LIABILITIES
Long-Term Debt	$8.595B	$14.25B
YoY Change	-39.69%	10.55%
Other Long-Term Liabilities	$2.015B	$2.118B
YoY Change	-4.86%	-4.94%
Total Long-Term Liabilities	$10.61B	$16.37B
YoY Change	-35.18%	8.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$437.0M	$255.0M
Total Long-Term Liabilities	$10.61B	$16.37B
Total Liabilities	$13.16B	$19.74B
YoY Change	-33.32%	-7.48%
SHAREHOLDERS EQUITY
Retained Earnings	$1.247B
YoY Change
Common Stock	$456.0K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$380.0K
YoY Change
Treasury Stock Shares	22.56K shares
Shareholders Equity	$1.493B	$1.800B
YoY Change
Total Liabilities & Shareholders Equity	$14.71B	$21.54B
YoY Change	-31.68%	-6.39%

Concept	2019 Q2	2018 Q2
OPERATING ACTIVITIES
Net Income	-$128.0M	$4.000M
YoY Change	-3300.0%	-43.74%
Depreciation, Depletion And Amortization	$226.3M	$23.50M
YoY Change	862.98%	-30.27%
Cash From Operating Activities	-$169.8M	-$120.0M
YoY Change	41.5%	-25.33%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	$200.4M	$358.4M
YoY Change	-44.08%	95.74%
Cash From Investing Activities	$200.4M	$358.4M
YoY Change	-44.08%	95.74%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-9.600M	-232.3M
YoY Change	-95.87%	172.33%
NET CHANGE
Cash From Operating Activities	-169.8M	-120.0M
Cash From Investing Activities	200.4M	358.4M
Cash From Financing Activities	-9.600M	-232.3M
Net Change In Cash	21.00M	6.100M
YoY Change	244.26%	-109.7%
FREE CASH FLOW
Cash From Operating Activities	-$169.8M	-$120.0M
Capital Expenditures
Free Cash Flow
YoY Change

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Entity Central Index Key EntityCentralIndexKey	0000874501
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
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CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	45336278	shares
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CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
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CY2019Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
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CY2019Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	28892	shares
CY2019Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	22558	shares
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-10777
	dei	Entity Registrant Name EntityRegistrantName	AMBAC FINANCIAL GROUP INC
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-3621676
	dei	Entity Address Address Line1 EntityAddressAddressLine1	One State Street Plaza
	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10004
	dei	City Area Code CityAreaCode	(212)
	dei	Local Phone Number LocalPhoneNumber	658-7470
	dei	Security12b Title Security12bTitle	Common stock par value $0.01 per share
	dei	Trading Symbol TradingSymbol	AMBC
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
	dei	Entity Bankruptcy Proceedings Reporting Current EntityBankruptcyProceedingsReportingCurrent	true
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CY2019Q2	us-gaap	Restricted Cash RestrictedCash	0	USD
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	us-gaap	Interest Expense Debt InterestExpenseDebt	135359000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	110519000	USD
CY2019Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	189233000	USD
CY2018Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	144330000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	330811000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	10078000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28322000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1995000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30313000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4600000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-128429000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	4313000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	314617000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-100107000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6308000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-141317000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-171630000	USD
	us-gaap	Net Income Loss NetIncomeLoss	310017000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	-128429000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	4313000	USD
	us-gaap	Profit Loss ProfitLoss	-171630000	USD
	us-gaap	Profit Loss ProfitLoss	310017000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	15238000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	575000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	71401000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	122879000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-18533000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-52989000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-3962000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-20933000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	163000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-906000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	319000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	208000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	322000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	302000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-45000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1161000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3454000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-53622000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	67803000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	100993000	USD
CY2019Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-131883000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-49309000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-103827000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	411010000	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.79
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.74
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.80
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.79
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.74
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.73
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45986043	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45683058	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45909595	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45577656	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	45986043	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46472375	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	45909595	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46097647	shares
CY2019Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1665888000	USD
CY2019Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-131883000	USD
CY2019Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3249000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-392000	USD
CY2019Q2	ambc	Amps Impacton Stockholders Equity AMPSImpactonStockholdersEquity	16054000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1552916000	USD
CY2018Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2109165000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-49309000	USD
CY2018Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4153000	USD
CY2018Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-91000	USD
CY2018Q2	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	3000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2063921000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1633147000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-103827000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7365000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-2589000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2000	USD
	ambc	Amps Impacton Stockholders Equity AMPSImpactonStockholdersEquity	18818000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1552916000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1645258000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	411010000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8765000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1116000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1000	USD
	ambc	Warrant Exercised During Period Value WarrantExercisedDuringPeriodValue	3000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2063921000	USD
	us-gaap	Profit Loss ProfitLoss	-171630000	USD
	us-gaap	Profit Loss ProfitLoss	310017000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	286000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	363000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	55095000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	102602000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	7365000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	8765000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	809000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	880000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	33000000	USD
	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	781000	USD
	ambc	Proceeds From Financial Guaranty Variable Interest Entity Assets ProceedsFromFinancialGuarantyVariableInterestEntityAssets	122085000	USD
	ambc	Proceeds From Financial Guaranty Variable Interest Entity Assets ProceedsFromFinancialGuarantyVariableInterestEntityAssets	137983000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	221000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-57310000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-23564000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-68222000	USD
	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	388314000	USD
	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1435042000	USD
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-2118000	USD
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-2282000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-53910000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-32432000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	42396000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-89633000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	262520000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	51878000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	598000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-760000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	53093000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	52010000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities	29000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities	1313000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	3121000	USD
	us-gaap	Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss	19215000	USD
	us-gaap	Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss	1151000	USD
	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	764000	USD
	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	120000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-95491000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-50599000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-264861000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1311588000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	689226000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	623495000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	274259000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	214066000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	426727000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	163917000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	48475000	USD
	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	51402000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	117386000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	18862000	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	342091000	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-164860000	USD
	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	64955000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-5543000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	312575000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1015351000	USD
	ambc	Proceeds From Issuanceof Tier Ii Notes ProceedsFromIssuanceofTierIINotes	0	USD
	ambc	Proceeds From Issuanceof Tier Ii Notes ProceedsFromIssuanceofTierIINotes	240000000	USD
	ambc	Proceeds From Issuanceof Ambac Uk Debt ProceedsFromIssuanceofAmbacUKDebt	12180000	USD
	ambc	Proceeds From Issuanceof Ambac Uk Debt ProceedsFromIssuanceofAmbacUKDebt	0	USD
	ambc	Proceedsfrom Saleof Senior Surplus Notes ProceedsfromSaleofSeniorSurplusNotes	0	USD
	ambc	Proceedsfrom Saleof Senior Surplus Notes ProceedsfromSaleofSeniorSurplusNotes	4571000	USD
	ambc	Paydownof Ambac Note PaydownofAmbacNote	21914000	USD
	ambc	Paydownof Ambac Note PaydownofAmbacNote	113457000	USD
	ambc	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	0	USD
	ambc	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	73993000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	191258000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	9221000	USD
	ambc	Amps Proceeds AMPSProceeds	18818000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2198000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1116000	USD
	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	USD
	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	3000	USD
	ambc	Paydownof Financial Guaranty Variable Interest Entity Liabilities PaydownofFinancialGuarantyVariableInterestEntityLiabilities	92042000	USD
	ambc	Paydownof Financial Guaranty Variable Interest Entity Liabilities PaydownofFinancialGuarantyVariableInterestEntityLiabilities	137984000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-85156000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-282455000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-37000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-539000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-37479000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-579231000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83493000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	624681000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	46014000	USD
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45450000	USD
	dei	Entity Incorporation Date Of Incorporation EntityIncorporationDateOfIncorporation	1991-04-29
CY2019Q2	us-gaap	Minority Interest MinorityInterest	59968000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	41150000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	13108000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3591000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	852000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	26910000	USD
	ambc	Non Cash Exchangeof Puerto Rico Bonds NonCashExchangeofPuertoRicoBonds	510215000	USD
CY2019Q2	ambc	Non Cash Impactof Rehabilitation Exit Transaction NonCashImpactofRehabilitationExitTransaction	0	USD
CY2018Q2	ambc	Non Cash Impactof Rehabilitation Exit Transaction NonCashImpactofRehabilitationExitTransaction	1918561000	USD
CY2019Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	17514000	USD
CY2018Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	44398000	USD
CY2019Q1	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2018Q1	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	46014000	USD
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45450000	USD
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;font-style:normal;font-weight:bold;text-decoration:none;">Reclassifications:</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">Reclassifications have been made to prior years' amounts to conform to the current year's presentation.</span></div>
CY2018Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	15000000	USD
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="line-height:120%;padding-bottom:4px;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;font-style:normal;font-weight:bold;text-decoration:none;">Future Application of Accounting Standards:</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">VIE Related Party Guidance</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In October 2018, the FASB issued ASU 2018-17,</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;"> Consolidation (Topic 810) - Targeted Improvements to Related Party Guidance for Variable Interest Entities. </span><span style="font-family:inherit;font-size:9pt;color:#000000;">To determine whether a decision-making fee is a variable interest, under the new guidance a reporting entity must consider indirect interests held through related parties under common control on a proportional basis rather than as a direct interest in its entirety (as currently required in GAAP). These amendments create alignment between determining whether a decision making fee is a variable interest and determining whether a reporting entity within a related party group is the primary beneficiary of a VIE. ASU 2018-17 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. Ambac will adopt this ASU on January 1, 2020. The ASU is not expected to have a consequential impact on Ambac's financial statements. </span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Cloud Computing Arrangement Service Contracts</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In August 2018, the FASB issued ASU 2018-15,</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;"> Intangibles—Goodwill and Other— Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. </span><span style="font-family:inherit;font-size:9pt;color:#000000;">The new guidance requires a customer in a cloud computing arrangement that is a service contract to capitalize certain implementation costs as if the arrangement was an internal-use software project. The internal-use software guidance requires the capitalization of certain costs incurred only during the application development stage (e.g., costs of integration with on-premises software, coding, configuration, customization). That guidance also requires entities to expense costs during the preliminary project and post-implementation stages (e.g., costs of project planning, training, maintenance after implementation, data conversion) as they are incurred. ASU 2018-15 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. The ASU may be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Ambac will adopt this ASU on January 1, 2020. The ASU is not expected to have a consequential impact on Ambac's financial statements.</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Defined Benefit and Other Postretirement Plans Disclosures</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In August 2018, the FASB issued ASU 2018-14, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20) - Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans</span><span style="font-family:inherit;font-size:9pt;color:#000000;">. The ASU modifies various disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Relevant disclosures that will be removed are: i) amounts in accumulated other comprehensive income expected to be recognized as net periodic benefit cost over the next fiscal year and ii) the effects of a one percentage point change in assumed health care cost trend rates on the (a) aggregate of the service and interest cost components of the net periodic pension cost and (b) benefit obligation for postretirement healthcare benefits. Relevant disclosures that will be added are an explanation of the reasons for significant gains and losses related to changes in the benefit obligations for the period. ASU 2018-14 is effective for fiscal years ending after December 15, 2020, with early adoption permitted. The modified disclosures must be applied on a retrospective basis for all periods presented. Ambac has not determined whether it will early adopt this ASU. The ASU is not expected to have a consequential impact on Ambac's financial statements.</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Fair Value Measurement Disclosures</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In August 2018, the FASB issued ASU 2018-13, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement</span><span style="font-family:inherit;font-size:9pt;color:#000000;">. The ASU modifies various disclosure requirements on fair value measurements. Relevant disclosures that will be removed, modified and added are as follows:</span></div><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><span style="font-family:inherit;font-size:9pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;text-decoration:underline;">Removals</span><span style="font-family:inherit;font-size:9pt;">: 1) Amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, 2) Policy for timing of transfers between levels, and 3) Valuation processes for Level 3 fair value measurements. </span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><span style="font-family:inherit;font-size:9pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;text-decoration:underline;">Modifications</span><span style="font-family:inherit;font-size:9pt;">: 1) For investments in certain entities that calculate net asset value, disclosures are only required for the timing of liquidation of an investee's assets and the date when restrictions from redemption might lapse, only if the investee has communicated the timing to the reporting entity or publicly announced it and 2) Clarification that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date and not possible future changes.</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><span style="font-family:inherit;font-size:9pt;color:#000000;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;text-decoration:underline;">Additions</span><span style="font-family:inherit;font-size:9pt;color:#000000;">: 1) Changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and 2) Range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Alternatively, an entity may disclose other quantitative information (such as the median or arithmetic average) if it determines that it is a more reasonable and rational method to reflect the distribution of unobservable inputs used.</span></div></td></tr></table><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">ASU 2018-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. Disclosure amendments related to changes in unrealized gains and losses included in other comprehensive income for Level 3 instruments, the range and weighted average of significant unobservable inputs, and the narrative description of </span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">measurement uncertainty should be applied prospectively only for the most recent interim or annual period presented. All other disclosure amendments should be applied retrospectively to all periods presented. Ambac has not determined whether it will early adopt this ASU. The ASU is not expected to have a consequential impact on Ambac's financial statements.</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Measurement of Credit Losses on Financial Instruments</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In June 2016, the FASB issued ASU 2016-13, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Financial Instruments-Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments, </span><span style="font-family:inherit;font-size:9pt;color:#000000;">subsequently amended by ASU 2018-19</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">, Codification Improvements to Topic 326, Financial Instruments - Credit Losses; </span><span style="font-family:inherit;font-size:9pt;color:#000000;">ASU 2019-04</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments</span><span style="font-family:inherit;font-size:9pt;color:#000000;">; and ASU 2019-05, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Financial Instruments—Credit Losses (Topic 326): Targeted Transition Relief </span><span style="font-family:inherit;font-size:9pt;color:#000000;"> (collectively "the ASU").</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">The ASU significantly affects how reporting entities will measure credit losses for financial assets that are not accounted for at fair value through net income, which include loans, debt securities, premium receivables, net investments in leases, and certain off-balance sheet credit exposures. The ASU does not apply to credit losses on financial guarantee insurance contracts accounted for under ASC 944. For financial assets measured at amortized cost, the ASU replaces the "incurred loss" model, which generally delayed recognition of the full amount of credit losses until the loss was probable of occurring, with an "expected loss" model, which reflects an entity's current estimate of all expected credit losses. Expected credit losses for amortized cost assets will be recorded as a valuation allowance, with subsequent increases or decreases in the allowance reflected in the income statement each period. For available-for-sale debt securities, credit losses under the ASU will be measured similarly to current GAAP. However, under the ASU, credit losses for available-for-sale debt securities will be recorded as a valuation allowance (similar to the amortized cost assets approach described above), rather than as a direct write-down of the security as is required under current GAAP. As a result, improvements to estimated credit losses for available-for-sale debt securities will be recognized immediately in the income statement rather than as interest income over time. The ASU is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. Ambac will adopt this ASU on January 1, 2020 and we are currently evaluating its impact on Ambac's financial statements. We have preliminarily identified the inventory of financial assets that will be affected by this standard. The remaining significant implementation matters to be addressed include identifying new data requirements and data sources for implementing the expected loss model for those instruments not already using this model and identifying and documenting accounting process changes, including related controls.</span></div>
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CY2018Q2	ambc	Variable Interest Entity Changein Fair Valueof Assetsand Liabilities VariableInterestEntityChangeinFairValueofAssetsandLiabilities	-450000	USD
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CY2018Q4	ambc	Estimated Future Premium Payments Weighted Average Discounted Rate EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate	0.027
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CY2018Q2	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
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	us-gaap	Direct Premiums Written DirectPremiumsWritten	-17259000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	39500000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	3650000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	59947000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	39000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	39000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	-844000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	3948000	USD

dei

Amendment Flag

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Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

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Document Fiscal Period Focus

DocumentFiscalPeriodFocus

Q2

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Document Fiscal Year Focus

DocumentFiscalYearFocus

2019

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Entity Central Index Key

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0000874501

CY2018Q4

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Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2019Q2

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Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2018Q4

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Common Stock Shares Authorized

CommonStockSharesAuthorized

130000000

shares

CY2019Q2

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Common Stock Shares Authorized

CommonStockSharesAuthorized

130000000

shares

CY2018Q4

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Common Stock Shares Issued

CommonStockSharesIssued

45365170

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CY2019Q2

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Common Stock Shares Issued

CommonStockSharesIssued

45571743

shares

CY2018Q4

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Common Stock Shares Outstanding

CommonStockSharesOutstanding

45336278

shares

CY2018Q2

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Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax

OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax

0

USD

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Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax

OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax

0

USD

CY2019Q2

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Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax

OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax

0

USD

us-gaap

Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax

OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax

0

USD

CY2018Q2

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Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax

-188000

USD

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Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax

42000

USD

CY2019Q2

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Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax

33000

USD

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Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax

65000

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CY2018Q2

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Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Plan Amendments Tax Effect

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPlanAmendmentsTaxEffect

0

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Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Plan Amendments Tax Effect

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0

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Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Plan Amendments Tax Effect

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansPlanAmendmentsTaxEffect

0

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CY2018Q2

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Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

1122000

USD

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Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

-586000

USD

CY2019Q2

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Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

-7005000

USD

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Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

-7603000

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CY2018Q4

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Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.01

CY2019Q2

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Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

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Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

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CY2019Q2

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Preferred Stock Shares Authorized

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Preferred Stock Shares Issued

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CY2019Q2

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Preferred Stock Shares Issued

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0

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CY2018Q4

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Preferred Stock Shares Outstanding

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0

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CY2019Q2

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Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

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CY2018Q4

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Treasury Stock Shares

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Treasury Stock Shares

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22558

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dei

Document Type

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10-Q

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Document Quarterly Report

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Document Period End Date

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2019-06-30

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Document Transition Report

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false

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Entity File Number

EntityFileNumber

1-10777

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Entity Registrant Name

EntityRegistrantName

AMBAC FINANCIAL GROUP INC

dei

Entity Incorporation State Country Code

EntityIncorporationStateCountryCode

DE

dei

Entity Tax Identification Number

EntityTaxIdentificationNumber

13-3621676

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Entity Address Address Line1

EntityAddressAddressLine1

One State Street Plaza

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Entity Address City Or Town

EntityAddressCityOrTown

New York

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Entity Address State Or Province

EntityAddressStateOrProvince

NY

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Entity Address Postal Zip Code

EntityAddressPostalZipCode

10004

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City Area Code

CityAreaCode

(212)

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Local Phone Number

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658-7470

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Security12b Title

Security12bTitle

Common stock par value $0.01 per share

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Trading Symbol

TradingSymbol

AMBC

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Security Exchange Name

SecurityExchangeName

NASDAQ

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Entity Current Reporting Status

EntityCurrentReportingStatus

Yes

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Entity Interactive Data Current

EntityInteractiveDataCurrent

Yes

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Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

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Entity Small Business

EntitySmallBusiness

false

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Entity Emerging Growth Company

EntityEmergingGrowthCompany

false

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Entity Shell Company

EntityShellCompany

false

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Entity Bankruptcy Proceedings Reporting Current

EntityBankruptcyProceedingsReportingCurrent

true

CY2019Q3

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Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

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CY2013Q2

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Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2019Q2

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Other Short Term Investments

OtherShortTermInvestments

772299000

USD

CY2018Q4

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Other Short Term Investments

OtherShortTermInvestments

430331000

USD

CY2019Q2

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Other Investments

OtherInvestments

469438000

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CY2018Q4

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Other Investments

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391217000

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CY2019Q2

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Investments

3930332000

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CY2018Q4

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Investments

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CY2019Q2

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Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

17514000

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Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

63089000

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Restricted Cash

RestrictedCash

0

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Restricted Cash

RestrictedCash

19405000

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CY2019Q2

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Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

441526000

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CY2018Q4

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Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

495391000

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CY2019Q2

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Reinsurance Recoverables

ReinsuranceRecoverables

27215000

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CY2018Q4

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Reinsurance Recoverables

ReinsuranceRecoverables

23133000

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CY2019Q2

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Prepaid Reinsurance Premiums

PrepaidReinsurancePremiums

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CY2018Q4

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Prepaid Reinsurance Premiums

PrepaidReinsurancePremiums

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CY2019Q2

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Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

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USD

CY2018Q4

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Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

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CY2019Q2

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Derivative Assets

DerivativeAssets

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Derivative Assets

DerivativeAssets

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CY2019Q2

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Income Taxes Receivable

IncomeTaxesReceivable

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CY2018Q4

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Income Taxes Receivable

IncomeTaxesReceivable

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CY2019Q2

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Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

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CY2018Q4

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Intangible Assets Net Excluding Goodwill

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CY2019Q2

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Other Assets

OtherAssets

190566000

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CY2018Q4

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Other Assets

OtherAssets

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CY2019Q2

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Assets

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CY2018Q4

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Assets

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Unearned Premiums

UnearnedPremiums

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Unearned Premiums

UnearnedPremiums

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CY2019Q2

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Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

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CY2018Q4

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Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

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CY2019Q2

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Reinsurance Payable

ReinsurancePayable

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CY2018Q4

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Reinsurance Payable

ReinsurancePayable

32913000

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CY2019Q2

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Deferred Income Tax Liabilities Net

DeferredIncomeTaxLiabilitiesNet

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CY2018Q4

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Deferred Income Tax Liabilities Net

DeferredIncomeTaxLiabilitiesNet

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CY2019Q2

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Long Term Debt

LongTermDebt

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CY2018Q4

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Long Term Debt

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Interest Payable Current And Noncurrent

InterestPayableCurrentAndNoncurrent

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Interest Payable Current And Noncurrent

InterestPayableCurrentAndNoncurrent

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CY2019Q2

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Derivative Liabilities

DerivativeLiabilities

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Derivative Liabilities

DerivativeLiabilities

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CY2019Q2

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Other Liabilities

OtherLiabilities

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CY2018Q4

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Other Liabilities

OtherLiabilities

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CY2019Q2

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Liabilities

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Liabilities

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Preferred Stock Value

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Preferred Stock Value

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Common Stock Value

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Common Stock Value

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Additional Paid In Capital

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Additional Paid In Capital

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Accumulated Other Comprehensive Income Loss Net Of Tax

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Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

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Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

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Treasury Stock Value

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Treasury Stock Value

TreasuryStockValue

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Stockholders Equity

StockholdersEquity

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CY2018Q4

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Stockholders Equity

StockholdersEquity

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CY2019Q2

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Minority Interest

MinorityInterest

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CY2018Q4

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Minority Interest

MinorityInterest

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Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

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CY2018Q4

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Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

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CY2019Q2

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Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

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Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

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Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

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PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

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Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

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Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

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CY2019Q2

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Net Investment Income

NetInvestmentIncome

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CY2018Q2

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Net Investment Income

NetInvestmentIncome

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Net Investment Income

NetInvestmentIncome

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Net Investment Income

NetInvestmentIncome

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CY2019Q2

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Other Than Temporary Impairment Losses Investments Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities

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CY2018Q2

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Other Than Temporary Impairment Losses Investments Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities

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Other Than Temporary Impairment Losses Investments Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities

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Other Than Temporary Impairment Losses Investments Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities

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Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest

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CY2019Q2

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Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

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CY2018Q2

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Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

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OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

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CY2019Q2

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Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

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Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

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us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

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us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

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CY2019Q2

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Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

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CY2018Q2

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Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

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us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

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Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

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CY2019Q2

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Gains Losses On Extinguishment Of Debt

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CY2018Q2

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Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

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Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

0

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Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

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CY2019Q2

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Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

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CY2018Q2

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Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

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Other Operating Income Expense Net

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Other Operating Income Expense Net

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CY2018Q2

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Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

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Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

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Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

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CY2019Q2

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Revenues

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CY2018Q2

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Revenues

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Revenues

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Revenues

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CY2019Q2

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Incurred Claims Financial Guarantee Insurance Contracts

IncurredClaimsFinancialGuaranteeInsuranceContracts

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CY2018Q2

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Incurred Claims Financial Guarantee Insurance Contracts

IncurredClaimsFinancialGuaranteeInsuranceContracts

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Incurred Claims Financial Guarantee Insurance Contracts

IncurredClaimsFinancialGuaranteeInsuranceContracts

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Incurred Claims Financial Guarantee Insurance Contracts

IncurredClaimsFinancialGuaranteeInsuranceContracts

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CY2019Q2

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Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

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CY2018Q2

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Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

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Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

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Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

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CY2019Q2

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Other Underwriting Expense

OtherUnderwritingExpense

29090000

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CY2018Q2

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Other Underwriting Expense

OtherUnderwritingExpense

26063000

USD

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Other Underwriting Expense

OtherUnderwritingExpense

54005000

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Other Underwriting Expense

OtherUnderwritingExpense

62497000

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CY2019Q2

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Interest Expense Debt

InterestExpenseDebt

67381000

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CY2018Q2

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Interest Expense Debt

InterestExpenseDebt

62446000

USD

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Interest Expense Debt

InterestExpenseDebt

135359000

USD

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Interest Expense Debt

InterestExpenseDebt

110519000

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CY2019Q2

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Benefits Losses And Expenses

BenefitsLossesAndExpenses

189233000

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CY2018Q2

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Benefits Losses And Expenses

BenefitsLossesAndExpenses

144330000

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Benefits Losses And Expenses

BenefitsLossesAndExpenses

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Benefits Losses And Expenses

BenefitsLossesAndExpenses

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Income Tax Expense Benefit

IncomeTaxExpenseBenefit

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CY2018Q2

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Income Tax Expense Benefit

IncomeTaxExpenseBenefit

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Income Tax Expense Benefit

IncomeTaxExpenseBenefit

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Income Tax Expense Benefit

IncomeTaxExpenseBenefit

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CY2019Q2

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Net Income Loss

NetIncomeLoss

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CY2018Q2

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Net Income Loss

NetIncomeLoss

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Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

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CY2019Q2

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IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-100107000

USD

CY2018Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

6308000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-141317000

USD

us-gaap

Net Income Loss

NetIncomeLoss

-171630000

USD

us-gaap

Net Income Loss

NetIncomeLoss

310017000

USD

CY2019Q2

us-gaap

Profit Loss

ProfitLoss

-128429000

USD

CY2018Q2

us-gaap

Profit Loss

ProfitLoss

4313000

USD

us-gaap

Profit Loss

ProfitLoss

-171630000

USD

us-gaap

Profit Loss

ProfitLoss

310017000

USD

CY2019Q2

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

15238000

USD

CY2018Q2

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

575000

USD

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

71401000

USD

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

122879000

USD

CY2019Q2

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-18533000

USD

CY2018Q2

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-52989000

USD

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-3962000

USD

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-20933000

USD

CY2019Q2

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax

163000

USD

CY2018Q2

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax

-906000

USD

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax

319000

USD

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax

208000

USD

CY2019Q2

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

322000

USD

CY2018Q2

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

302000

USD

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

-45000

USD

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

1161000

USD

CY2019Q2

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

-3454000

USD

CY2018Q2

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

-53622000

USD

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

67803000

USD

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

100993000

USD

CY2019Q2

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-131883000

USD

CY2018Q2

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-49309000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-103827000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

411010000

USD

CY2019Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-2.79

CY2018Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.09

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-3.74

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

6.80

CY2019Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-2.79

CY2018Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.09

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-3.74

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

6.73

CY2019Q2

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45986043

shares

CY2018Q2

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45683058

shares

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45909595

shares

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45577656

shares

CY2019Q2

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

45986043

shares

CY2018Q2

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

46472375

shares

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

45909595

shares

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

46097647

shares

CY2019Q1

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1665888000

USD

CY2019Q2

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-131883000

USD

CY2019Q2

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

3249000

USD

CY2019Q2

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-392000

USD

CY2019Q2

ambc

Amps Impacton Stockholders Equity

AMPSImpactonStockholdersEquity

16054000

USD

CY2019Q2

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1552916000

USD

CY2018Q1

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

2109165000

USD

CY2018Q2

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-49309000

USD

CY2018Q2

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

4153000

USD

CY2018Q2

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-91000

USD

CY2018Q2

us-gaap

Proceeds From Warrant Exercises

ProceedsFromWarrantExercises

3000

USD

CY2018Q2

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

2063921000

USD

CY2018Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1633147000

USD

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-103827000

USD

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

7365000

USD

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-2589000

USD

us-gaap

Stock Issued During Period Value New Issues

StockIssuedDuringPeriodValueNewIssues

2000

USD

ambc

Amps Impacton Stockholders Equity

AMPSImpactonStockholdersEquity

18818000

USD

CY2019Q2

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1552916000

USD

CY2017Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1645258000

USD

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

411010000

USD

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

8765000

USD

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-1116000

USD

us-gaap

Stock Issued During Period Value New Issues

StockIssuedDuringPeriodValueNewIssues

1000

USD

ambc

Warrant Exercised During Period Value

WarrantExercisedDuringPeriodValue

3000

USD

CY2018Q2

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

2063921000

USD

us-gaap

Profit Loss

ProfitLoss

-171630000

USD

us-gaap

Profit Loss

ProfitLoss

310017000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

286000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

363000

USD

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

55095000

USD

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

102602000

USD

us-gaap

Share Based Compensation

ShareBasedCompensation

7365000

USD

us-gaap

Share Based Compensation

ShareBasedCompensation

8765000

USD

us-gaap

Increase Decrease In Deferred Income Taxes

IncreaseDecreaseInDeferredIncomeTaxes

809000

USD

us-gaap

Increase Decrease In Deferred Income Taxes

IncreaseDecreaseInDeferredIncomeTaxes

880000

USD

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

33000000

USD

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

781000

USD

ambc

Proceeds From Financial Guaranty Variable Interest Entity Assets

ProceedsFromFinancialGuarantyVariableInterestEntityAssets

122085000

USD

ambc

Proceeds From Financial Guaranty Variable Interest Entity Assets

ProceedsFromFinancialGuarantyVariableInterestEntityAssets

137983000

USD

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

221000

USD

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-57310000

USD

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

-23564000

USD

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-68222000

USD

us-gaap

Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve

IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve

388314000

USD

us-gaap

Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve

IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve

1435042000

USD

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

-2118000

USD

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

-2282000

USD

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-53910000

USD

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-32432000

USD

us-gaap

Increase Decrease In Interest Payable Net

IncreaseDecreaseInInterestPayableNet

42396000

USD

us-gaap

Increase Decrease In Interest Payable Net

IncreaseDecreaseInInterestPayableNet

-89633000

USD

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

262520000

USD

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

51878000

USD

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

598000

USD

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

-760000

USD

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

53093000

USD

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

52010000

USD

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities

29000

USD

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities

1313000

USD

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

0

USD

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

3121000

USD

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

19215000

USD

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

1151000

USD

us-gaap

Increase Decrease In Derivative Assets And Liabilities

IncreaseDecreaseInDerivativeAssetsAndLiabilities

764000

USD

us-gaap

Increase Decrease In Derivative Assets And Liabilities

IncreaseDecreaseInDerivativeAssetsAndLiabilities

120000

USD

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-95491000

USD

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-50599000

USD

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-264861000

USD

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-1311588000

USD

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

689226000

USD

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

623495000

USD

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

274259000

USD

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

214066000

USD

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

426727000

USD

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

163917000

USD

us-gaap

Proceeds From Sale And Maturity Of Other Investments

ProceedsFromSaleAndMaturityOfOtherInvestments

48475000

USD

us-gaap

Proceeds From Sale And Maturity Of Other Investments

ProceedsFromSaleAndMaturityOfOtherInvestments

51402000

USD

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

117386000

USD

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

18862000

USD

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

342091000

USD

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

-164860000

USD

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

64955000

USD

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

-5543000

USD

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

312575000

USD

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

1015351000

USD

ambc

Proceeds From Issuanceof Tier Ii Notes

ProceedsFromIssuanceofTierIINotes

0

USD

ambc

Proceeds From Issuanceof Tier Ii Notes

ProceedsFromIssuanceofTierIINotes

240000000

USD

ambc

Proceeds From Issuanceof Ambac Uk Debt

ProceedsFromIssuanceofAmbacUKDebt

12180000

USD

ambc

Proceeds From Issuanceof Ambac Uk Debt

ProceedsFromIssuanceofAmbacUKDebt

0

USD

ambc

Proceedsfrom Saleof Senior Surplus Notes

ProceedsfromSaleofSeniorSurplusNotes

0

USD

ambc

Proceedsfrom Saleof Senior Surplus Notes

ProceedsfromSaleofSeniorSurplusNotes

4571000

USD

ambc

Paydownof Ambac Note

PaydownofAmbacNote

21914000

USD

ambc

Paydownof Ambac Note

PaydownofAmbacNote

113457000

USD

ambc

Paydown Of Variable Interest Entity Secured Borrowing

PaydownOfVariableInterestEntitySecuredBorrowing

0

USD

ambc

Paydown Of Variable Interest Entity Secured Borrowing

PaydownOfVariableInterestEntitySecuredBorrowing

73993000

USD

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

0

USD

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

191258000

USD

us-gaap

Payments Of Debt Issuance Costs

PaymentsOfDebtIssuanceCosts

0

USD

us-gaap

Payments Of Debt Issuance Costs

PaymentsOfDebtIssuanceCosts

9221000

USD

ambc

Amps Proceeds

AMPSProceeds

18818000

USD

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

2198000

USD

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

1116000

USD

us-gaap

Proceeds From Warrant Exercises

ProceedsFromWarrantExercises

0

USD

us-gaap

Proceeds From Warrant Exercises

ProceedsFromWarrantExercises

3000

USD

ambc

Paydownof Financial Guaranty Variable Interest Entity Liabilities

PaydownofFinancialGuarantyVariableInterestEntityLiabilities

92042000

USD

ambc

Paydownof Financial Guaranty Variable Interest Entity Liabilities

PaydownofFinancialGuarantyVariableInterestEntityLiabilities

137984000

USD

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-85156000

USD

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-282455000

USD

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-37000

USD

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-539000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-37479000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-579231000

USD

CY2018Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

83493000

USD

CY2017Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

624681000

USD

CY2019Q2

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

46014000

USD

CY2018Q2

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

45450000

USD

dei

Entity Incorporation Date Of Incorporation

EntityIncorporationDateOfIncorporation

1991-04-29

CY2019Q2

us-gaap

Minority Interest

MinorityInterest

59968000

USD

CY2018Q4

us-gaap

Minority Interest

MinorityInterest

41150000

USD

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

13108000

USD

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-3591000

USD

us-gaap

Income Taxes Paid

IncomeTaxesPaid

852000

USD

us-gaap

Income Taxes Paid

IncomeTaxesPaid

26910000

USD

ambc

Non Cash Exchangeof Puerto Rico Bonds

NonCashExchangeofPuertoRicoBonds

510215000

USD

CY2019Q2

ambc

Non Cash Impactof Rehabilitation Exit Transaction

NonCashImpactofRehabilitationExitTransaction

0

USD

CY2018Q2

ambc

Non Cash Impactof Rehabilitation Exit Transaction

NonCashImpactofRehabilitationExitTransaction

1918561000

USD

CY2019Q2

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

17514000

USD

CY2018Q2

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

44398000

USD

CY2019Q1

us-gaap

Restricted Cash

RestrictedCash

0

USD

CY2018Q1

us-gaap

Restricted Cash

RestrictedCash

0

USD

CY2019Q2

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

46014000

USD

CY2018Q2

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

45450000

USD

us-gaap

Prior Period Reclassification Adjustment Description

PriorPeriodReclassificationAdjustmentDescription

<div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;font-style:normal;font-weight:bold;text-decoration:none;">Reclassifications:</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">Reclassifications have been made to prior years' amounts to conform to the current year's presentation.</span></div>

CY2018Q4

us-gaap

Operating Lease Liability

OperatingLeaseLiability

15000000

USD

us-gaap

Description Of New Accounting Pronouncements Not Yet Adopted

DescriptionOfNewAccountingPronouncementsNotYetAdopted

<div style="line-height:120%;padding-bottom:4px;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;font-style:normal;font-weight:bold;text-decoration:none;">Future Application of Accounting Standards:</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">VIE Related Party Guidance</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In October 2018, the FASB issued ASU 2018-17,</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;"> Consolidation (Topic 810) - Targeted Improvements to Related Party Guidance for Variable Interest Entities. </span><span style="font-family:inherit;font-size:9pt;color:#000000;">To determine whether a decision-making fee is a variable interest, under the new guidance a reporting entity must consider indirect interests held through related parties under common control on a proportional basis rather than as a direct interest in its entirety (as currently required in GAAP). These amendments create alignment between determining whether a decision making fee is a variable interest and determining whether a reporting entity within a related party group is the primary beneficiary of a VIE. ASU 2018-17 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. Ambac will adopt this ASU on January 1, 2020. The ASU is not expected to have a consequential impact on Ambac's financial statements. </span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Cloud Computing Arrangement Service Contracts</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In August 2018, the FASB issued ASU 2018-15,</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;"> Intangibles—Goodwill and Other— Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. </span><span style="font-family:inherit;font-size:9pt;color:#000000;">The new guidance requires a customer in a cloud computing arrangement that is a service contract to capitalize certain implementation costs as if the arrangement was an internal-use software project. The internal-use software guidance requires the capitalization of certain costs incurred only during the application development stage (e.g., costs of integration with on-premises software, coding, configuration, customization). That guidance also requires entities to expense costs during the preliminary project and post-implementation stages (e.g., costs of project planning, training, maintenance after implementation, data conversion) as they are incurred. ASU 2018-15 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. The ASU may be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. Ambac will adopt this ASU on January 1, 2020. The ASU is not expected to have a consequential impact on Ambac's financial statements.</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Defined Benefit and Other Postretirement Plans Disclosures</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In August 2018, the FASB issued ASU 2018-14, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20) - Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans</span><span style="font-family:inherit;font-size:9pt;color:#000000;">. The ASU modifies various disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. Relevant disclosures that will be removed are: i) amounts in accumulated other comprehensive income expected to be recognized as net periodic benefit cost over the next fiscal year and ii) the effects of a one percentage point change in assumed health care cost trend rates on the (a) aggregate of the service and interest cost components of the net periodic pension cost and (b) benefit obligation for postretirement healthcare benefits. Relevant disclosures that will be added are an explanation of the reasons for significant gains and losses related to changes in the benefit obligations for the period. ASU 2018-14 is effective for fiscal years ending after December 15, 2020, with early adoption permitted. The modified disclosures must be applied on a retrospective basis for all periods presented. Ambac has not determined whether it will early adopt this ASU. The ASU is not expected to have a consequential impact on Ambac's financial statements.</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Fair Value Measurement Disclosures</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In August 2018, the FASB issued ASU 2018-13, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement</span><span style="font-family:inherit;font-size:9pt;color:#000000;">. The ASU modifies various disclosure requirements on fair value measurements. Relevant disclosures that will be removed, modified and added are as follows:</span></div><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><span style="font-family:inherit;font-size:9pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;text-decoration:underline;">Removals</span><span style="font-family:inherit;font-size:9pt;">: 1) Amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, 2) Policy for timing of transfers between levels, and 3) Valuation processes for Level 3 fair value measurements. </span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><span style="font-family:inherit;font-size:9pt;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;text-decoration:underline;">Modifications</span><span style="font-family:inherit;font-size:9pt;">: 1) For investments in certain entities that calculate net asset value, disclosures are only required for the timing of liquidation of an investee's assets and the date when restrictions from redemption might lapse, only if the investee has communicated the timing to the reporting entity or publicly announced it and 2) Clarification that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date and not possible future changes.</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-bottom:12px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><span style="font-family:inherit;font-size:9pt;color:#000000;">•</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;text-decoration:underline;">Additions</span><span style="font-family:inherit;font-size:9pt;color:#000000;">: 1) Changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and 2) Range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. Alternatively, an entity may disclose other quantitative information (such as the median or arithmetic average) if it determines that it is a more reasonable and rational method to reflect the distribution of unobservable inputs used.</span></div></td></tr></table><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">ASU 2018-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted. Disclosure amendments related to changes in unrealized gains and losses included in other comprehensive income for Level 3 instruments, the range and weighted average of significant unobservable inputs, and the narrative description of </span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">measurement uncertainty should be applied prospectively only for the most recent interim or annual period presented. All other disclosure amendments should be applied retrospectively to all periods presented. Ambac has not determined whether it will early adopt this ASU. The ASU is not expected to have a consequential impact on Ambac's financial statements.</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-style:italic;font-weight:bold;text-decoration:none;">Measurement of Credit Losses on Financial Instruments</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">In June 2016, the FASB issued ASU 2016-13, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Financial Instruments-Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments, </span><span style="font-family:inherit;font-size:9pt;color:#000000;">subsequently amended by ASU 2018-19</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">, Codification Improvements to Topic 326, Financial Instruments - Credit Losses; </span><span style="font-family:inherit;font-size:9pt;color:#000000;">ASU 2019-04</span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments</span><span style="font-family:inherit;font-size:9pt;color:#000000;">; and ASU 2019-05, </span><span style="font-family:inherit;font-size:9pt;color:#000000;font-style:italic;">Financial Instruments—Credit Losses (Topic 326): Targeted Transition Relief </span><span style="font-family:inherit;font-size:9pt;color:#000000;"> (collectively "the ASU").</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">The ASU significantly affects how reporting entities will measure credit losses for financial assets that are not accounted for at fair value through net income, which include loans, debt securities, premium receivables, net investments in leases, and certain off-balance sheet credit exposures. The ASU does not apply to credit losses on financial guarantee insurance contracts accounted for under ASC 944. For financial assets measured at amortized cost, the ASU replaces the "incurred loss" model, which generally delayed recognition of the full amount of credit losses until the loss was probable of occurring, with an "expected loss" model, which reflects an entity's current estimate of all expected credit losses. Expected credit losses for amortized cost assets will be recorded as a valuation allowance, with subsequent increases or decreases in the allowance reflected in the income statement each period. For available-for-sale debt securities, credit losses under the ASU will be measured similarly to current GAAP. However, under the ASU, credit losses for available-for-sale debt securities will be recorded as a valuation allowance (similar to the amortized cost assets approach described above), rather than as a direct write-down of the security as is required under current GAAP. As a result, improvements to estimated credit losses for available-for-sale debt securities will be recognized immediately in the income statement rather than as interest income over time. The ASU is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years, with early adoption permitted. Ambac will adopt this ASU on January 1, 2020 and we are currently evaluating its impact on Ambac's financial statements. We have preliminarily identified the inventory of financial assets that will be affected by this standard. The remaining significant implementation matters to be addressed include identifying new data requirements and data sources for implementing the expected loss model for those instruments not already using this model and identifying and documenting accounting process changes, including related controls.</span></div>

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ambc

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Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax

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Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax

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Variable Interest Entity Entity Maximum Loss Exposure Amount

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CY2019Q2

ambc

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CY2019Q2

ambc

Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities

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CY2019Q2

ambc

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Variable Interest Entity Entity Maximum Loss Exposure Amount

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Equity Method Investments Fair Value Disclosure

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Equity Method Investments

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Equity Method Investments

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CY2019Q2

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Accumulated Other Comprehensive Income Loss Net Of Tax

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Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

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CY2019Q2

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CY2019Q2

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CY2013Q2

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CY2019Q2

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CY2018Q2

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Weighted Average Number Of Shares Outstanding Basic

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Weighted Average Number Of Shares Outstanding Basic

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Weighted Average Number Of Shares Outstanding Basic

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Weighted Average Number Diluted Shares Outstanding Adjustment

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Weighted Average Number Diluted Shares Outstanding Adjustment

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Weighted Average Number Of Diluted Shares Outstanding

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Weighted Average Number Of Diluted Shares Outstanding

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Weighted Average Number Of Diluted Shares Outstanding

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Premiums Receivable Allowance For Doubtful Accounts

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Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract

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Financial Guarantee Insurance Contracts Premiums Receivable Accretion Of Discount On Premium Receivable

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Financial Guarantee Insurance Contracts Premiums Receivable Accretion Of Discount On Premium Receivable

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Allowance For Doubtful Accounts Receivable Period Increase Decrease

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Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments

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Financial Guarantee Insurance Contracts Premium Receivable

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Financial Guarantee Insurance Contracts Premium Receivable

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Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount

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Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount

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6054000

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Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount

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6103000

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Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount

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15495000

USD

CY2019Q2

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Direct Premiums Written

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CY2019Q2

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Direct Premiums Earned

DirectPremiumsEarned

10066000

USD

CY2018Q2

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-611000

USD

CY2018Q2

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

27339000

USD

CY2019Q2

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2019Q2

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

20000

USD

CY2018Q2

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2018Q2

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

19000

USD

CY2019Q2

us-gaap

Ceded Premiums Written

CededPremiumsWritten

-343000

USD

CY2019Q2

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

2253000

USD

CY2018Q2

us-gaap

Ceded Premiums Written

CededPremiumsWritten

-224000

USD

CY2018Q2

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

1522000

USD

CY2019Q2

us-gaap

Premiums Written Net

PremiumsWrittenNet

-20262000

USD

CY2019Q2

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

7833000

USD

CY2018Q2

us-gaap

Premiums Written Net

PremiumsWrittenNet

-387000

USD

CY2018Q2

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

25836000

USD

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-17259000

USD

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

39500000

USD

us-gaap

Direct Premiums Written

DirectPremiumsWritten

3650000

USD

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

59947000

USD

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

39000

USD

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

39000

USD

us-gaap

Ceded Premiums Written

CededPremiumsWritten

-844000

USD

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

3948000

USD

us-gaap

Ceded Premiums Written

CededPremiumsWritten

-1043000

USD

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

3267000

USD

us-gaap

Premiums Written Net

PremiumsWrittenNet

-16415000

USD

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

35591000

USD

us-gaap

Premiums Written Net

PremiumsWrittenNet

4693000

USD

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

56719000

USD

CY2019Q2

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

7833000

USD

CY2018Q2

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

25836000

USD

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

35591000

USD

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

56719000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Third Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringThirdQuarterFollowingBalanceSheetDate

12324000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Third Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringThirdQuarterFollowingBalanceSheetDate

11927000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Fourth Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringFourthQuarterFollowingBalanceSheetDate

11060000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Fourth Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFourthQuarterFollowingBalanceSheetDate

11541000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than One And Within Two Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate

43319000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than One And Within Two Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate

45409000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Two And Within Three Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate

37827000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Two And Within Three Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate

41186000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Three And Within Four Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate

35997000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Three And Within Four Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate

38351000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Four And Within Five Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate

34530000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Four And Within Five Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate

35714000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Five And Within10 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFiveAndWithin10YearsFromBalanceSheetDate

151837000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Five And Within10 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFiveAndWithin10YearsFromBalanceSheetDate

146197000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than10 And Within15 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan10AndWithin15YearsFromBalanceSheetDate

113812000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than10 And Within15 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan10AndWithin15YearsFromBalanceSheetDate

96407000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than15 And Within20 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan15AndWithin20YearsFromBalanceSheetDate

61127000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than15 And Within20 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan15AndWithin20YearsFromBalanceSheetDate

48749000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than20 And Within25 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan20AndWithin25YearsFromBalanceSheetDate

26437000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than20 And Within25 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan20AndWithin25YearsFromBalanceSheetDate

16643000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than25 And Within30 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan25AndWithin30YearsFromBalanceSheetDate

6885000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than30 And Within35 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan30AndWithin35YearsFromBalanceSheetDate

2252000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than30 And Within35 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan30AndWithin35YearsFromBalanceSheetDate

1577000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than25 And Within30 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan25AndWithin30YearsFromBalanceSheetDate

11782000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than35 And Within40 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan35AndWithin40YearsFromBalanceSheetDate

31000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than35 And Within40 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan35AndWithin40YearsFromBalanceSheetDate

50000

USD

CY2018Q4

us-gaap

Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

1826078000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Premium Expected To Be Collected

FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollected

542335000

USD

CY2019Q2

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognized

500636000

USD

CY2019Q2

us-gaap

Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

1494106000

USD

CY2019Q2

us-gaap

Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

1984826000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-490720000

USD

CY2018Q4

us-gaap

Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

1932960000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-106882000

USD

us-gaap

Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense

ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense

<div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:0px;text-indent:0px;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;color:#000000;">Below is the loss and loss expense reserve roll-forward, net of subrogation recoverable and reinsurance, for the affected periods:</span></div><div style="line-height:120%;padding-bottom:4px;padding-top:0px;text-align:justify;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.79035639412997%;border-collapse:collapse;text-align:left;"><tr><td colspan="8"/></tr><tr><td style="width:60%;"/><td style="width:1%;"/><td style="width:17%;"/><td style="width:1%;"/><td style="width:2%;"/><td style="width:1%;"/><td style="width:17%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Six Months Ended June 30,</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2019</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2018</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Beginning gross loss and loss expense reserves</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(106,882</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>4,113,802</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Reinsurance recoverable</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>22,623</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>40,658</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Beginning balance of net loss and loss expense reserves</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(129,505</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>4,073,144</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Losses and loss expenses (benefit):</span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Current year</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>806</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>996</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Prior years</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(121,879</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(215,812</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Total </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(1) (2) (3)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(121,073</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(214,816</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Loss and loss expenses paid (recovered):</span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Current year</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>40</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>105</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Prior years </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(3)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>194,106</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>3,708,992</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Total</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>194,146</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>3,709,097</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Foreign exchange effect</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(799</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(6,378</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Ending net loss and loss expense reserves </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(445,523</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>142,853</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Impact of VIE consolidation</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(72,159</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">—</span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Reinsurance recoverable </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(4)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>26,962</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>38,293</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Ending gross loss and loss expense reserves</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;"><span>(490,720</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#2a1aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>181,146</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr></table></div><span style="font-family:Times New Roman;font-size:8pt;"><br/></span></div><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">(1)</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">Total losses and loss expenses (benefit) includes </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$(6,067)</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> and </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$870</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> for the </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">six months ended June 30, 2019 and 2018</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">, respectively, related to ceded reinsurance.</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">(2)</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">Ambac records the impact of estimated recoveries related to securitized loans in RMBS transactions that breached certain representations and warranties ("R&W"s) by transaction sponsors within losses and loss expenses (benefit). The losses and loss expense (benefit) incurred associated with changes in estimated R&Ws for the </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">six months ended June 30, 2019 and 2018</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> was </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$8,188</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> and </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$17,602</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">, respectively.</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:0px;padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">(3)</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">On February 12, 2018, Deferred Amounts and Interest Accrued on Deferred Amounts in the amount of </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$3,000,158</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> and </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$856,834</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">, respectively were settled in connection with the Rehabilitation Exit Transactions. 2018 includes a </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$288,204</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> loss and loss expense benefit on these settled Deferred Amounts.</span></div></td></tr></table><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">(4)</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">Represents reinsurance recoverable on future loss and loss expenses. Additionally, the Balance Sheet line "Reinsurance recoverable on paid and unpaid losses" includes reinsurance recoverables (payables) of </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$253</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> and </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$778</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> as of </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">June 30, 2019 and 2018</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">, respectively, related to previously presented loss and loss expenses and subrogation.</span></div>

CY2018Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

-106882000

USD

CY2017Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

4113802000

USD

CY2018Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

22623000

USD

CY2017Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

40658000

USD

CY2018Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

-129505000

USD

CY2017Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

4073144000

USD

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

806000

USD

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

996000

USD

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

-121879000

USD

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

-215812000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

-121073000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

-214816000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

40000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

105000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

194106000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

3708992000

USD

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

194146000

USD

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

3709097000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-799000

USD

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-6378000

USD

CY2019Q2

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

-445523000

USD

CY2018Q2

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

142853000

USD

CY2019Q2

ambc

Impactof Vie Consolidationon Gross Lossand Loss Reserves

ImpactofVIEConsolidationonGrossLossandLossReserves

72159000

USD

CY2019Q2

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

26962000

USD

CY2018Q2

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

38293000

USD

CY2019Q2

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

-490720000

USD

CY2018Q2

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

181146000

USD

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

6067000

USD

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

-870000

USD

ambc

Net Incurred Rmbs Subrogation Recoveries

NetIncurredRMBSSubrogationRecoveries

-8188000

USD

ambc

Net Incurred Rmbs Subrogation Recoveries

NetIncurredRMBSSubrogationRecoveries

-17602000

USD

CY2018Q1

ambc

Satisfactionanddischargeofsegregatedaccountdeferredamounts

3000158000

USD

CY2018Q1

ambc

Lossand Loss Expense Benefiton Settled Deferred Amounts

LossandLossExpenseBenefitonSettledDeferredAmounts

288204000

USD

CY2019Q2

ambc

Ceded Loss And Loss Expenses Paid Not Yet Recovered

CededLossAndLossExpensesPaidNotYetRecovered

253000

USD

CY2018Q1

ambc

Satisfactionanddischargeofsegregatedaccountdeferredinterestamounts

856834000

USD

CY2018Q2

ambc

Ceded Loss And Loss Expenses Paid Not Yet Recovered

CededLossAndLossExpensesPaidNotYetRecovered

778000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding

233

Policies

us-gaap

Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period

InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod

P14Y

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal

6956772000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest

3406384000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding

10363156000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability

-2474995000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Discount On Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability

-572500000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability

-1902495000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation

1792616000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation

30399000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1762217000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation

705060000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation

51547000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation

653513000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability

513235000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue

-60413000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Loss Adjustment Expenses Reserve

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve

82928000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-490720000

USD

CY2019Q2

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable

27215000

USD

CY2019Q2

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

26962000

USD

CY2019Q2

ambc

Ceded Loss And Loss Expenses Paid Not Yet Recovered

CededLossAndLossExpensesPaidNotYetRecovered

253000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding

231

Policies

CY2018

us-gaap

Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period

InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod

P16Y

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal

9403405000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest

10582773000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding

19986178000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability

-3448228000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Discount On Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability

-1091958000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability

-2356270000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation

1809937000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation

39391000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1770546000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation

784891000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation

133188000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation

651703000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability

65979000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue

-106662000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Loss Adjustment Expenses Reserve

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve

65759000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-106882000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable

23133000

USD

CY2018Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

22623000

USD

CY2018Q4

ambc

Ceded Loss And Loss Expenses Paid Not Yet Recovered

CededLossAndLossExpensesPaidNotYetRecovered

510000

USD

CY2019Q2

ambc

Possible Increasein Domestic Public Finance Loss Reserves

PossibleIncreaseinDomesticPublicFinanceLossReserves

1100000000

USD

CY2019Q2

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1552916000

USD

CY2019Q2

ambc

Stockholders Equity After Possible Increasein Domestic Public Finance Loss Reserves

StockholdersEquityAfterPossibleIncreaseinDomesticPublicFinanceLossReserves

452916000

USD

CY2019Q1

ambc

Percent Cash New Cofina Bonds Allocated Under Poa

PercentCashNewCOFINABondsAllocatedUnderPOA

0.93

CY2019Q2

ambc

Ambac Assurance Remaining Policy Obligations

AmbacAssuranceRemainingPolicyObligations

177605000

USD

CY2019Q2

ambc

Ambac Assurance Remaining Policy Obligations

AmbacAssuranceRemainingPolicyObligations

177605000

USD

CY2019Q2

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1762217000

USD

CY2019Q2

ambc

Balance Of Rmbs Subrogation Recoveries Net Of Reinsurance

BalanceOfRmbsSubrogationRecoveriesNetOfReinsurance

-1736055000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1770546000

USD

CY2018Q4

ambc

Balance Of Rmbs Subrogation Recoveries Net Of Reinsurance

BalanceOfRmbsSubrogationRecoveriesNetOfReinsurance

-1744243000

USD

CY2019Q2

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

226242000

USD

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

262520000

USD

CY2018Q2

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

23242000

USD

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

51878000

USD

CY2019Q2

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

1265052000

USD

CY2018Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

1551576000

USD

CY2019Q2

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

810222000

USD

CY2018Q4

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

832645000

USD

CY2019Q2

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

454830000

USD

CY2018Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

718931000

USD

CY2019Q2

us-gaap

Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year

FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

24591000

USD

CY2019Q2

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Two

FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

45139000

USD

CY2019Q2

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Three

FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

39777000

USD

CY2019Q2

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Four

FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

36194000

USD

CY2019Q2

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Five

FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

33016000

USD

CY2019Q2

us-gaap

Finite Lived Intangible Assets Amortization Expense After Year Five

FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

276113000

USD

CY2019Q1

us-gaap

Derivative Credit Risk Valuation Adjustment Derivative Liabilities

DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities

75000

USD

CY2018Q4

us-gaap

Derivative Credit Risk Valuation Adjustment Derivative Liabilities

DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities

138000

USD

CY2019Q1

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

71855000

USD

CY2018Q1

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

77630000

USD

CY2019Q2

us-gaap

Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings

FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

388000

USD

CY2018Q2

us-gaap

Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings

FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

282000

USD

CY2019Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

2385000

USD

CY2018Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

-3514000

USD

CY2019Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

0

USD

CY2018Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

0

USD

CY2019Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues

0

USD

CY2018Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues

0

USD

CY2019Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

0

USD

CY2018Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

0

USD

CY2019Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

310000

USD

CY2018Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

287000

USD

CY2019Q2

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree

0

USD

CY2018Q2

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree

5309000

USD

CY2019Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

74318000

USD

CY2018Q2

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

68802000

USD

CY2019Q2

us-gaap

Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss

FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

0

USD

CY2018Q2

us-gaap

Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss

FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

0

USD

CY2018Q4

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability

72071000

USD

CY2017Q4

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability

808557000

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings

771000

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings

35466000

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss

2114000

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss

-56022000

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues

0

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues

0

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements

638000

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements

713890000

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersOutOfLevelThree

0

USD

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersOutOfLevelThree

5309000

USD

CY2019Q2

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability

74318000

USD

CY2018Q2

ambc

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability

68802000

USD

CY2018Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

359943000

USD

CY2018Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

10897000

USD

CY2019Q2

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

3322599000

USD

CY2019Q2

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

140254000

USD

CY2019Q2

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

1959000

USD

CY2019Q2

us-gaap

Available For Sale Securities Current

AvailableForSaleSecuritiesCurrent

3460894000

USD

CY2019Q2

us-gaap

Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

62000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

3451149000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

133052000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

38195000

USD

CY2018Q4

us-gaap

Available For Sale Securities Current

AvailableForSaleSecuritiesCurrent

3546006000

USD

CY2018Q4

us-gaap

Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

32000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

885076000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities Within One Year Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

885352000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

1094834000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

1114706000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

391425000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

411322000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

287559000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

316218000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis

AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

2658894000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Maturities Single Maturity Date

AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

2727598000

USD

CY2019Q2

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

3322599000

USD

CY2019Q2

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

3460894000

USD

CY2019Q2

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

144371000

USD

CY2019Q2

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

942000

USD

CY2019Q2

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

70611000

USD

CY2019Q2

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

1017000

USD

CY2019Q2

us-gaap

Debt Securities Available For Sale Unrealized Loss Position

DebtSecuritiesAvailableForSaleUnrealizedLossPosition

214982000

USD

CY2019Q2

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

1959000

USD

CY2018Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

1139101000

USD

CY2018Q4

us-gaap

Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

27298000

USD

CY2018Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position

DebtSecuritiesAvailableForSaleUnrealizedLossPosition

1499044000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

38195000

USD

CY2019Q2

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

10218000

USD

CY2018Q2

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

41974000

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

34437000

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

53028000

USD

CY2019Q2

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

211000

USD

CY2018Q2

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

1641000

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

4499000

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

3029000

USD

CY2019Q2

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

35860000

USD

CY2018Q2

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

47148000

USD

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

53093000

USD

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

52010000

USD

CY2019Q2

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

0

USD

CY2018Q2

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

1014000

USD

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

29000

USD

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

1313000

USD

CY2018Q4

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

12454000

USD

CY2017Q4

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

67085000

USD

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

0

USD

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

226000

USD

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

0

USD

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

98000

USD

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

-774000

USD

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

-28677000

USD

CY2019Q2

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

11680000

USD

CY2018Q2

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

38732000

USD

CY2019Q2

ambc

Fair Value Of Securities Deposited With Governmental Authorities

FairValueOfSecuritiesDepositedWithGovernmentalAuthorities

7613000

USD

CY2018Q4

ambc

Fair Value Of Securities Deposited With Governmental Authorities

FairValueOfSecuritiesDepositedWithGovernmentalAuthorities

5975000

USD

CY2019Q2

ambc

Fair Valueof Securities Depositedin Connectionwtih Letterof Credit

FairValueofSecuritiesDepositedinConnectionwtihLetterofCredit

1412000

USD

CY2019Q2

ambc

Market Valueof Secured Note Collateral

MarketValueofSecuredNoteCollateral

205960000

USD

CY2018Q4

ambc

Market Valueof Secured Note Collateral

MarketValueofSecuredNoteCollateral

209983000

USD

CY2019Q2

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

1471000

USD

CY2018Q2

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

1374000

USD

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

2882000

USD

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

3200000

USD

CY2019Q2

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

78329000

USD

CY2018Q2

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

61742000

USD

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

124881000

USD

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

172293000

USD

CY2019Q2

us-gaap

Net Investment Income

NetInvestmentIncome

86459000

USD

CY2018Q2

us-gaap

Net Investment Income

NetInvestmentIncome

66662000

USD

us-gaap

Net Investment Income

NetInvestmentIncome

141301000

USD

us-gaap

Net Investment Income

NetInvestmentIncome

176902000

USD

CY2019Q2

us-gaap

Net Realized Or Unrealized Gain Loss On Trading Securities

NetRealizedOrUnrealizedGainLossOnTradingSecurities

6766000

USD

CY2018Q2

us-gaap

Net Realized Or Unrealized Gain Loss On Trading Securities

NetRealizedOrUnrealizedGainLossOnTradingSecurities

3632000

USD

CY2019Q2

us-gaap

Trading Securities Realized Gain Loss

TradingSecuritiesRealizedGainLoss

2664000

USD

CY2018Q2

us-gaap

Trading Securities Realized Gain Loss

TradingSecuritiesRealizedGainLoss

344000

USD

CY2019Q2

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

72615000

USD

CY2019Q2

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

239000

USD

CY2019Q2

us-gaap

Derivative Assets

DerivativeAssets

72376000

USD

CY2019Q2

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

0

USD

CY2019Q2

ambc

Derivative Assets Net Amount

DerivativeAssetsNetAmount

72376000

USD

CY2019Q2

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

88484000

USD

CY2019Q2

us-gaap

Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

239000

USD

CY2019Q2

us-gaap

Derivative Liabilities

DerivativeLiabilities

88245000

USD

CY2019Q2

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

86427000

USD

CY2019Q2

ambc

Derivative Liabilities Net Amount

DerivativeLiabilitiesNetAmount

1818000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

59768000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

300000

USD

CY2018Q4

us-gaap

Derivative Assets

DerivativeAssets

59468000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

0

USD

CY2018Q4

ambc

Derivative Assets Net Amount

DerivativeAssetsNetAmount

59468000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

76999000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

300000

USD

CY2018Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

76699000

USD

CY2018Q4

ambc

Derivative Liabilities Gross Amount Of Collateral Cash And Securities Pledged Not Offset

DerivativeLiabilitiesGrossAmountOfCollateralCashAndSecuritiesPledgedNotOffset

70505000

USD

CY2018Q4

ambc

Derivative Liabilities Net Amount

DerivativeLiabilitiesNetAmount

6194000

USD

CY2019Q2

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

35435000

USD

CY2018Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

102904000

USD

CY2019Q2

us-gaap

Derivative Collateral Obligation To Return Cash

DerivativeCollateralObligationToReturnCash

0

USD

CY2019Q2

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-35412000

USD

CY2018Q2

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

8932000

USD

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-51571000

USD

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

34123000

USD

CY2019Q2

ambc

Derivative Gain Losson Derivatives Total Net

DerivativeGainLossonDerivativesTotalNet

-68069000

USD

CY2018Q2

ambc

Derivative Gain Losson Derivatives Total Net

DerivativeGainLossonDerivativesTotalNet

186304000

USD

ambc

Derivative Gain Losson Derivatives Total Net

DerivativeGainLossonDerivativesTotalNet

-161143000

USD

ambc

Derivative Gain Losson Derivatives Total Net

DerivativeGainLossonDerivativesTotalNet

252687000

USD

CY2019Q2

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

86696000

USD

CY2018Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

67071000

USD

CY2019Q2

us-gaap

Collateral Already Posted Aggregate Fair Value

CollateralAlreadyPostedAggregateFairValue

103764000

USD

CY2018Q4

us-gaap

Collateral Already Posted Aggregate Fair Value

CollateralAlreadyPostedAggregateFairValue

83700000

USD

ambc

Current Year Loss Attributedto Tier B

CurrentYearLossAttributedtoTierB

53122000

USD

CY2019Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

-57408000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

413000

USD

CY2019Q2

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

28322000

USD

CY2018Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

13104000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

-120812000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

310846000

USD

CY2019Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

-42699000

USD

CY2018Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

-6796000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

-20505000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

3771000

USD

CY2019Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-100107000

USD

CY2018Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

6308000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-141317000

USD

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

314617000

USD

CY2019Q2

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

USD

CY2018Q2

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

USD

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

USD

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

USD

CY2019Q2

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

284000

USD

CY2018Q2

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

645000

USD

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

-3242000

USD

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

1682000

USD

CY2019Q2

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

27873000

USD

CY2018Q2

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

2544000

USD

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

34339000

USD

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

2505000

USD

CY2019Q2

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

28157000

USD

CY2018Q2

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

3189000

USD

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

31097000

USD

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

4187000

USD

CY2019Q2

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

165000

USD

CY2018Q2

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

-1194000

USD

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

-784000

USD

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

413000

USD

CY2019Q2

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

165000

USD

CY2018Q2

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-1194000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-784000

USD

CY2018Q2

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

1995000

USD

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

30313000

USD

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

4600000

USD

CY2011Q3

us-gaap

Operating Loss Carryforwards

OperatingLossCarryforwards

3650000000

USD

CY2019Q2

ambc

Tier C Tolling Payments Payableto Irs

TierCTollingPaymentsPayabletoIRS

0.125

CY2019Q2

ambc

Tier D Tolling Payments Payableto Irs

TierDTollingPaymentsPayabletoIRS

0.175

CY2019Q2

ambc

Tolling Payment Payableto Afg Generatedin Prior Years

TollingPaymentPayabletoAFGGeneratedinPriorYears

44381000

USD

CY2017Q4

ambc

Tolling Payment Payableto Afg Generatedin Prior Years

TollingPaymentPayabletoAFGGeneratedinPriorYears

27868000

USD

CY2018Q4

ambc

Tolling Payment Payableto Afg Gross

TollingPaymentPayabletoAFGGross

16513000

USD

CY2011Q3

us-gaap

Operating Loss Carryforwards

OperatingLossCarryforwards

3650000000

USD

CY2019Q2

us-gaap

Operating Lease Expense

OperatingLeaseExpense

2088000

USD

us-gaap

Operating Lease Expense

OperatingLeaseExpense

3614000

USD

CY2019Q2

us-gaap

Variable Lease Cost

VariableLeaseCost

122000

USD

us-gaap

Variable Lease Cost

VariableLeaseCost

301000

USD

CY2019Q2

us-gaap

Sublease Income

SubleaseIncome

-280000

USD

us-gaap

Sublease Income

SubleaseIncome

-345000

USD

CY2019Q2

us-gaap

Lease Cost

LeaseCost

1930000

USD

us-gaap

Lease Cost

LeaseCost

3570000

USD

CY2019Q2

us-gaap

Operating Lease Payments

OperatingLeasePayments

1743000

USD

us-gaap

Operating Lease Payments

OperatingLeasePayments

3286000

USD

CY2019Q2

ambc

Rightof Use Assets Obtainedin Exchangefor Lease Obligation Non Cash

RightofUseAssetsObtainedinExchangeforLeaseObligationNonCash

14939000

USD

ambc

Rightof Use Assets Obtainedin Exchangefor Lease Obligation Non Cash

RightofUseAssetsObtainedinExchangeforLeaseObligationNonCash

29299000

USD

CY2018Q4

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

14360

USD

CY2019Q2

us-gaap

Operating Lease Right Of Use Asset

OperatingLeaseRightOfUseAsset

26529000

USD

CY2019Q2

us-gaap

Operating Lease Liability

OperatingLeaseLiability

29664000

USD

CY2019Q2

us-gaap

Operating Lease Weighted Average Remaining Lease Term1

OperatingLeaseWeightedAverageRemainingLeaseTerm1

P10Y

CY2019Q2

us-gaap

Operating Lease Weighted Average Discount Rate Percent

OperatingLeaseWeightedAverageDiscountRatePercent

0.079

CY2019Q2

us-gaap

Lessee Operating Lease Liability Payments Remainder Of Fiscal Year

LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

2043000

USD

CY2019Q2

us-gaap

Lessee Operating Lease Liability Payments Due Year Two

LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

4099000

USD

CY2019Q2

us-gaap

Lessee Operating Lease Liability Payments Due Year Three

LesseeOperatingLeaseLiabilityPaymentsDueYearThree

3970000

USD

CY2019Q2

us-gaap

Lessee Operating Lease Liability Payments Due Year Four

LesseeOperatingLeaseLiabilityPaymentsDueYearFour

3970000

USD

CY2019Q2

us-gaap

Lessee Operating Lease Liability Payments Due Year Five

LesseeOperatingLeaseLiabilityPaymentsDueYearFive

3970000

USD

CY2019Q2

us-gaap

Lessee Operating Lease Liability Payments Due After Year Five

LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

25883000

USD

CY2019Q2

us-gaap

Lessee Operating Lease Liability Payments Due

LesseeOperatingLeaseLiabilityPaymentsDue

43935000

USD

CY2019Q2

us-gaap

Lessee Operating Lease Liability Undiscounted Excess Amount

LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

-14271000

USD

CY2019Q2

us-gaap

Operating Lease Liability

OperatingLeaseLiability

29664000

USD

CY2019Q1

us-gaap

Lessor Operating Lease Term Of Contract

LessorOperatingLeaseTermOfContract

P10Y6M

CY2019Q2

us-gaap

Operating Leases Future Minimum Payments Receivable Remainder Of Fiscal Year

OperatingLeasesFutureMinimumPaymentsReceivableRemainderOfFiscalYear

172000

USD

CY2019Q2

us-gaap

Operating Leases Future Minimum Payments Receivable In Two Years

OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears

1038000

USD

CY2019Q2

us-gaap

Operating Leases Future Minimum Payments Receivable In Three Years

OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears

1051000

USD

CY2019Q2

us-gaap

Operating Leases Future Minimum Payments Receivable In Four Years

OperatingLeasesFutureMinimumPaymentsReceivableInFourYears

1078000

USD

CY2019Q2

us-gaap

Operating Leases Future Minimum Payments Receivable In Five Years

OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears

1131000

USD

CY2019Q2

us-gaap

Operating Leases Future Minimum Payments Due Thereafter

OperatingLeasesFutureMinimumPaymentsDueThereafter

7571000

USD

CY2019Q2

us-gaap

Lessor Operating Lease Payments To Be Received

LessorOperatingLeasePaymentsToBeReceived

12041000

USD

ambc

General Obligation Bonds Issuedin2012and2014

GeneralObligationBondsIssuedin2012and2014

6000000000

USD

CY2019Q2

us-gaap

Gain Contingency Unrecorded Amount

GainContingencyUnrecordedAmount

142000000

USD

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$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc

2019 Q2 Form 10-Q Financial Statement

#000087450119000114 Filed on August 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC AMBAC FINANCIAL GROUP INC Stock $ambc

2019 Q2 Form 10-Q Financial Statement

#000087450119000114 Filed on August 08, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc