$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc

$ambc Overview Financials Valuation SEC Filings Company Website

2013 Q2 Form 10-Q Financial Statement

#000119312513222662 Filed on May 15, 2013

Income Statement

Concept	2013 Q2	2013 Q1	2012 Q4
Revenue	$594.4M	$291.4M	$171.7M
YoY Change	39526.67%	-10.09%	-666.67%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$25.80M	$700.0K	$800.0K
YoY Change	3585.71%	-12.5%	0.0%
% of Gross Profit
Operating Expenses	$38.80M	-$17.30M	-$1.100M
YoY Change	-94.99%	-150.58%	-100.13%
Operating Profit
YoY Change
Interest Expense	-$29.00M	-$23.20M	-$23.40M
YoY Change	-9.09%	-31.36%	-29.31%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$3.271B	$282.9M	$145.4M
YoY Change	-502.03%	11.55%	-115.09%
Income Tax	$600.0K	$657.0K	$2.100M
% Of Pretax Income	0.02%	0.23%	1.44%
Net Earnings	$3.272B	$282.3M	$143.6M
YoY Change	-503.45%	11.44%	-114.91%
Net Earnings / Revenue	550.54%	96.87%	83.63%
Basic Earnings Per Share		$0.93
Diluted Earnings Per Share	$70.22M	$0.93	$474.6K
COMMON SHARES
Basic Shares Outstanding	45.00M shares	302.5M shares	302.4M shares
Diluted Shares Outstanding		302.6M shares

Balance Sheet

Concept	2013 Q2	2013 Q1	2012 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$21.00M	$53.14M	$43.84M
Short-Term Investments
Other Short-Term Assets	$159.0M	$170.0M	$178.0M
YoY Change	-19.29%	-15.84%	-19.46%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$161.0M	$211.0M	$179.0M
YoY Change	-47.9%	-31.94%	-30.89%
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill	$514.5M
YoY Change
Intangibles
YoY Change
Long-Term Investments	$22.67B	$23.26B	$24.17B
YoY Change	-2.72%	-2.3%	3.18%
Other Assets	$23.00M	$2.000M	$2.000M
YoY Change	360.0%	-60.0%	-60.0%
Total Long-Term Assets	$28.69B	$25.95B	$26.91B
YoY Change	9.08%	-4.1%	0.19%
TOTAL ASSETS
Total Short-Term Assets	$161.0M	$211.0M	$179.0M
Total Long-Term Assets	$28.69B	$25.95B	$26.91B
Total Assets	$28.85B	$26.16B	$27.09B
YoY Change	8.42%	-4.41%	-0.1%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$250.0M	$247.0M	$232.0M
YoY Change	26.9%	24.75%	33.33%
Deferred Revenue
YoY Change
Short-Term Debt	$452.0M	$506.0M	$531.0M
YoY Change	14.72%	30.75%	27.95%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.109B	$1.231B	$1.222B
YoY Change	-2.38%	-2.92%	-0.89%
LONG-TERM LIABILITIES
Long-Term Debt	$15.21B	$14.38B	$15.59B
YoY Change	4.77%	-3.43%	7.4%
Other Long-Term Liabilities	$2.083B	$4.114B	$4.029B
YoY Change	-46.12%	8.01%	3.25%
Total Long-Term Liabilities	$17.30B	$18.50B	$19.62B
YoY Change	-5.93%	-1.1%	6.52%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.109B	$1.231B	$1.222B
Total Long-Term Liabilities	$17.30B	$18.50B	$19.62B
Total Liabilities	$28.39B	$29.03B	$30.33B
YoY Change	-8.49%	-6.19%	0.23%
SHAREHOLDERS EQUITY
Retained Earnings		-$6.015B	-$6.297B
YoY Change			4.26%
Common Stock	$623.1K	$3.080M	$3.080M
YoY Change			0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$410.7M	$410.8M
YoY Change			-0.16%
Treasury Stock Shares			5.581M shares
Shareholders Equity	$287.0M	-$3.531B	-$3.908B
YoY Change
Total Liabilities & Shareholders Equity	$27.48B	$26.16B	$27.09B
YoY Change	3.24%	-4.41%	-0.1%

Cashflow Statement

Concept	2013 Q2	2013 Q1	2012 Q4
OPERATING ACTIVITIES
Net Income	$3.272B	$282.3M	$143.6M
YoY Change	-503.45%	11.44%	-114.91%
Depreciation, Depletion And Amortization	$25.80M	$700.0K	$800.0K
YoY Change	3585.71%	-12.5%	0.0%
Cash From Operating Activities	-$38.40M	$77.33M	-$215.7M
YoY Change	668.0%	91.65%	10.45%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	$10.60M	-$20.51M	$229.0M
YoY Change	-96.58%	24027.06%	15.6%
Cash From Investing Activities	$10.60M	-$63.97M	$229.0M
YoY Change	-96.58%	633.71%	15.6%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-4.700M	-4.067M	-59.50M
YoY Change	-98.41%	-47.18%	634.57%
NET CHANGE
Cash From Operating Activities	-38.40M	77.33M	-215.7M
Cash From Investing Activities	10.60M	-63.97M	229.0M
Cash From Financing Activities	-4.700M	-4.067M	-59.50M
Net Change In Cash	-32.50M	9.298M	-46.20M
YoY Change	-461.11%	-61.15%	771.7%
FREE CASH FLOW
Cash From Operating Activities	-$38.40M	$77.33M	-$215.7M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	45000000	shares
CY2012Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-2913642000
CY2012Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	39931000
CY2012Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	204388000
CY2012Q1	ambc	Assets Segment AssetsSegment	27372884000
CY2013Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4657096000
CY2013Q1	us-gaap	Other Assets OtherAssets	40365000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than One And Within Two Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate	132258000
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1156493000
CY2013Q1	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	66865000
CY2013Q1	us-gaap	Deferred Income Taxes And Other Liabilities Noncurrent DeferredIncomeTaxesAndOtherLiabilitiesNoncurrent	1540000
CY2013Q1	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3134054000
CY2013Q1	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	5197000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than25 And Within30 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan25AndWithin30YearsFromBalanceSheetDate	42639000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding	305	Policies
CY2013Q1	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	165528000
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	916863000
CY2013Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-2870070000
CY2013Q1	us-gaap	Available For Sale Securities AvailableForSaleSecurities	6398450000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than20 And Within25 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan20AndWithin25YearsFromBalanceSheetDate	149612000
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	65636000
CY2013Q1	us-gaap	Reorganization Value ReorganizationValue	28496726000
CY2013Q1	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	154685000
CY2013Q1	us-gaap	Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts	6590216000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Third Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringThirdQuarterFollowingBalanceSheetDate	32009000
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	888233000
CY2013Q1	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0
CY2013Q1	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	66865000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than15 And Within20 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan15AndWithin20YearsFromBalanceSheetDate	283899000
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	720071000
CY2013Q1	us-gaap	Liabilities Subject To Compromise Debt And Accrued Interest LiabilitiesSubjectToCompromiseDebtAndAccruedInterest	1690312000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than15 And Within20 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan15AndWithin20YearsFromBalanceSheetDate	290129000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1543098000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Five And Within10 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFiveAndWithin10YearsFromBalanceSheetDate	502819000
CY2013Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-6015025000
CY2013Q1	us-gaap	Assets Assets	26164660000
CY2013Q1	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	812059000
CY2013Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	355075000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than30 And Within35 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan30AndWithin35YearsFromBalanceSheetDate	14828000
CY2013Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	53135000
CY2013Q1	us-gaap	Derivative Liabilities DerivativeLiabilities	505746000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal	22870428000
CY2013Q1	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	33944000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding	30905285000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Four And Within Five Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate	114183000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Three And Within Four Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate	120311000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue	563471000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest	8034857000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability	6045209000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than30 And Within35 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan30AndWithin35YearsFromBalanceSheetDate	15846000
CY2013Q1	us-gaap	Minority Interest MinorityInterest	660472000
CY2013Q1	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	233425000
CY2013Q1	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	147925000
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	978051000
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	979204000
CY2013Q1	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	61709000
CY2013Q1	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1543098000
CY2013Q1	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	5926000
CY2013Q1	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	191683000
CY2013Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	97274000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Fourth Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFourthQuarterFollowingBalanceSheetDate	52685000
CY2013Q1	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	160682000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Third Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringThirdQuarterFollowingBalanceSheetDate	55616000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability	9833615000
CY2013Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	26164660000
CY2013Q1	us-gaap	Borrowings Under Guaranteed Investment Agreements BorrowingsUnderGuaranteedInvestmentAgreements	357371000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognized	2453413000
CY2013Q1	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	192306000
CY2013Q1	us-gaap	Common Stock Value CommonStockValue	3080000
CY2013Q1	us-gaap	Derivative Liability Fair Value Net1 DerivativeLiabilityFairValueNet1	-57557000
CY2013Q1	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	899000
CY2013Q1	us-gaap	Notional Amount Of Credit Risk Derivatives NotionalAmountOfCreditRiskDerivatives	10204738000
CY2013Q1	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	6045209000
CY2013Q1	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	246378000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Second Quarter Following The Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringSecondQuarterFollowingTheBalanceSheetDate	34028000
CY2013Q1	us-gaap	Statutory Accounting Practices Statutory Capital And Surplus Required StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired	100000000
CY2013Q1	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	49	Transactions
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than25 And Within30 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan25AndWithin30YearsFromBalanceSheetDate	51437000
CY2013Q1	us-gaap	Investment Related Liabilities InvestmentRelatedLiabilities	17051000
CY2013Q1	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	14230000
CY2013Q1	us-gaap	Liabilities Liabilities	29034730000
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	906835000
CY2013Q1	us-gaap	Derivative Assets DerivativeAssets	112811000
CY2013Q1	us-gaap	Investments Investments	6512262000
CY2013Q1	us-gaap	Long Term Debt LongTermDebt	153873000
CY2013Q1	us-gaap	Other Liabilities OtherLiabilities	91057000
CY2013Q1	us-gaap	Cash Cash	53135000
CY2013Q1	us-gaap	Liabilities Subject To Compromise Other Liabilities LiabilitiesSubjectToCompromiseOtherLiabilities	14329000
CY2013Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	5896460000
CY2013Q1	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	16751505000
CY2013Q1	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	5156000
CY2013Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	576368000
CY2013Q1	us-gaap	Liabilities Subject To Compromise LiabilitiesSubjectToCompromise	1704641000
CY2013Q1	us-gaap	Treasury Stock Value TreasuryStockValue	410695000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Two And Within Three Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate	126751000
CY2013Q1	us-gaap	Reinsurance Payable ReinsurancePayable	92085000
CY2013Q1	us-gaap	Preferred Stock Value PreferredStockValue
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	1035633000
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	65636000
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	203307000
CY2013Q1	us-gaap	Other Investments OtherInvestments	113812000
CY2013Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	910005000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Five And Within10 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFiveAndWithin10YearsFromBalanceSheetDate	639948000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable	160682000
CY2013Q1	us-gaap	Accounts Payable Interest Bearing Interest Rate AccountsPayableInterestBearingInterestRate	0.051	pure
CY2013Q1	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	16548127000
CY2013Q1	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	228228000
CY2013Q1	us-gaap	Other Receivables OtherReceivables	40822000
CY2013Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2172027000
CY2013Q1	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability	6472838000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than35 And Within40 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan35AndWithin40YearsFromBalanceSheetDate	3639000
CY2013Q1	us-gaap	Other Short Term Investments OtherShortTermInvestments	767932000
CY2013Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5402290000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Second Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringSecondQuarterFollowingBalanceSheetDate	58929000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Fourth Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringFourthQuarterFollowingBalanceSheetDate	30709000
CY2013Q1	us-gaap	Unearned Premiums UnearnedPremiums	2623445000
CY2013Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	221293000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than10 And Within15 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan10AndWithin15YearsFromBalanceSheetDate	396110000
CY2013Q1	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	194154000
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	-3530542000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than35 And Within40 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan35AndWithin40YearsFromBalanceSheetDate	4692000
CY2013Q1	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	177515000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Expected To Be Collected FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollected	1993926000
CY2013Q1	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	170032000
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	183291000
CY2013Q1	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	545007000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than10 And Within15 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan10AndWithin15YearsFromBalanceSheetDate	452156000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than20 And Within25 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan20AndWithin25YearsFromBalanceSheetDate	149835000
CY2013Q1	us-gaap	Notes Receivable Net NotesReceivableNet	8691000
CY2013Q1	ambc	Equity Securities Fair Value EquitySecuritiesFairValue	185000000
CY2013Q1	ambc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	355075000
CY2013Q1	ambc	Securities Continuous Unrealized Loss Position Fair Value SecuritiesContinuousUnrealizedLossPositionFairValue	578371000
CY2013Q1	ambc	Change In Beneficial Ownership Percentage ChangeInBeneficialOwnershipPercentage	0.05	pure
CY2013Q1	ambc	Subrogation Recoverable SubrogationRecoverable	545007000
CY2013Q1	ambc	Other Short Term Investments Amortized Cost OtherShortTermInvestmentsAmortizedCost	767919000
CY2013Q1	ambc	Amortized Cost On Investment AmortizedCostOnInvestment	5653081000
CY2013Q1	ambc	Assets Segment AssetsSegment	26164660000
CY2013Q1	ambc	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses By Closed Block Life Insurance AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesByClosedBlockLifeInsurance	3431000
CY2013Q1	ambc	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses By Issuance By Large Diversified Financial Services AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesByIssuanceByLargeDiversifiedFinancialServices	2375000
CY2013Q1	ambc	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Related To Alta Number AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesRelatedToAltaNumber	15	Security
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal	24060370000
CY2013Q1	ambc	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Secured By Lease Payments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesSecuredByLeasePayments	28912000
CY2013Q1	ambc	Available For Sale Securities Debt Maturities With Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithMaturityDateAmortizedCost	3747564000
CY2013Q1	ambc	Available For Sale Securities Debt Maturities With Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithMaturityDateFairValue	4023753000
CY2013Q1	ambc	Available For Sale Securities Pledged As Collateral Amortized Cost Basis AvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	228066000
CY2013Q1	ambc	Available For Sale Securities Pledged As Collateral Gross Unrealized Gain AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	162000
CY2013Q1	ambc	Available For Sale Securities Pledged As Collateral Gross Unrealized Losses AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses
CY2013Q1	ambc	Estimated Future Premium Payments Weighted Average Discounted Rate EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate	0.048	pure
CY2013Q1	ambc	Fair Value Input Weighted Average Credit Derivative Quote As Percentage Of Notional FairValueInputWeightedAverageCreditDerivativeQuoteAsPercentageOfNotional	0.09	pure
CY2013Q1	ambc	Fair Value Input Weighted Average Credit Rating FairValueInputWeightedAverageCreditRating	A
CY2013Q1	ambc	Fair Value Input Weighted Average Life FairValueInputWeightedAverageLife	P7Y6M
CY2013Q1	ambc	Fair Value Of Securities Deposited With Governmental Authorities FairValueOfSecuritiesDepositedWithGovernmentalAuthorities	6929000
CY2013Q1	ambc	Gross Unrealized Gains On Investment GrossUnrealizedGainsOnInvestment	812234000
CY2013Q1	ambc	Gross Unrealized Loss On Investment GrossUnrealizedLossOnInvestment	66865000
CY2013Q1	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateral	6170222000
CY2013Q1	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral Amortized Cost Basis InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	5425015000
CY2013Q1	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Gain InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	812072000
CY2013Q1	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Losses InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses	66865000
CY2013Q1	ambc	Liabilities Subject To Compromise Including Subsidiaries Liability LiabilitiesSubjectToCompromiseIncludingSubsidiariesLiability	1704641000
CY2013Q1	ambc	Loss Reserves Ceded To Reinsurers LossReservesCededToReinsurers	148749000
CY2013Q1	ambc	Non Credit Other Than Temporary Impairments On Investments NonCreditOtherThanTemporaryImpairmentsOnInvestments	6590000
CY2013Q1	ambc	Number Of Remediation Transactions NumberOfRemediationTransactions	49	Transactions
CY2013Q1	ambc	Payment By Subsidiary To Internal Revenue Service Associated With Net Operating Loss Usage Tier C Under Amended Tax Sharing Agreement PaymentBySubsidiaryToInternalRevenueServiceAssociatedWithNetOperatingLossUsageTierCUnderAmendedTaxSharingAgreement	0.125	pure
CY2013Q1	ambc	Payment By Subsidiary To Internal Revenue Service Associated With Net Operating Loss Usage Tier D Under Amended Tax Sharing Agreement PaymentBySubsidiaryToInternalRevenueServiceAssociatedWithNetOperatingLossUsageTierDUnderAmendedTaxSharingAgreement	0.175	pure
CY2013Q1	ambc	Percentage Of Credit Value Adjustment PercentageOfCreditValueAdjustment	0.500	pure
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Discount On Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability	2281736000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability	12115351000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation	65915000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation	873408000
CY2013Q1	ambc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	61709000
CY2013Q1	ambc	Securities Held To Collateralize And Fund Repayment Of Debt Issued Through Resecuritization Transaction Fair Value SecuritiesHeldToCollateralizeAndFundRepaymentOfDebtIssuedThroughResecuritizationTransactionFairValue	218735000
CY2013Q1	ambc	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	5156000
CY2013Q1	ambc	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	223296000
CY2013Q1	ambc	Subrogation Recoverable Included In Loss And Loss Expense Reserves SubrogationRecoverableIncludedInLossAndLossExpenseReserves	2482302000
CY2013Q1	ambc	Estimated Liabilities Fair Value EstimatedLiabilitiesFairValue	28088686000
CY2013Q1	ambc	Estimated Noncontrolling Interest Fair Value EstimatedNoncontrollingInterestFairValue	223040000
CY2013Q1	ambc	Secured Note Outstanding SecuredNoteOutstanding	358568000
CY2013Q1	ambc	Insurance Liabilities Allocated To Segregated Account InsuranceLiabilitiesAllocatedToSegregatedAccount	6211471000
CY2013Q1	ambc	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Forty And Within Forty Five Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFortyAndWithinFortyFiveYearsFromBalanceSheetDate	92000
CY2013Q1	ambc	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Forty And Within Forty Five Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFortyAndWithinFortyFiveYearsFromBalanceSheetDate	297000
CY2013Q1	ambc	Liabilities Subject To Compromise Not Recognized In Balance Sheet LiabilitiesSubjectToCompromiseNotRecognizedInBalanceSheet	232556000
CY2013Q1	ambc	Reserve For Loss Adjustment Expenses ReserveForLossAdjustmentExpenses	134477000
CY2013Q1	ambc	Balance Of Gross Rmbs Subrogation Recoveries BalanceOfGrossRmbsSubrogationRecoveries	2487369000
CY2013Q1	ambc	Balance Of Rmbs Subrogation Recoveries Net Of Reinsurance BalanceOfRmbsSubrogationRecoveriesNetOfReinsurance	2460389000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Rmbs Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation	2497395000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Rmbs Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation	10026000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation	939323000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Loss Adjustment Expenses Reserve ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve	135842000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation	2487369000
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	43837000
CY2012Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	531315000
CY2013Q1	ambc	Subrogation Recoverable Asset SubrogationRecoverableAsset	878475000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Rmbs Gross Claim Liabilities Before Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesBeforeSubrogationRecoveries	3439641000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Rmbs Gross Claim Liabilities After Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesAfterSubrogationRecoveries	952272000
CY2013Q1	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Subrogation Rmbs ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilitySubrogationRmbs	2487369000
CY2013Q1	ambc	Change In Loss And Loss Expense Reserves Net ChangeInLossAndLossExpenseReservesNet	-78271000
CY2013Q1	ambc	Financial And Derivative Assets Gross Recognized Amount FinancialAndDerivativeAssetsGrossRecognizedAmount	178447000
CY2013Q1	ambc	Financial And Derivative Liability Gross Recognized Amount FinancialAndDerivativeLiabilityGrossRecognizedAmount	571382000
CY2013Q1	ambc	Derivative Assets Gross Amount Of Cash Collateral Pledged Not Offset DerivativeAssetsGrossAmountOfCashCollateralPledgedNotOffset
CY2013Q1	ambc	Derivative Assets Net Amount DerivativeAssetsNetAmount	112811000
CY2013Q1	ambc	Derivative Liabilities Gross Amount Of Cash Collateral Pledged Not Offset DerivativeLiabilitiesGrossAmountOfCashCollateralPledgedNotOffset	148836000
CY2013Q1	ambc	Derivative Liabilities Net Amount DerivativeLiabilitiesNetAmount	356910000
CY2013Q1	ambc	Loss Carry Forward Relinquishment LossCarryForwardRelinquishment	1059988000
CY2013Q1	ambc	Net Operating Loss Will Be Reduced For Cancellation Of Indebtedness Income And Reduction Of Interest Expense NetOperatingLossWillBeReducedForCancellationOfIndebtednessIncomeAndReductionOfInterestExpense	816380000
CY2013Q1	ambc	Financial Guarantee Insurance Contracts Premium Receivable Deemed Uncollectible FinancialGuaranteeInsuranceContractsPremiumReceivableDeemedUncollectible	119162000
CY2010Q4	ambc	Amount Of Loss Carry Forward Relinquish By Which Loss Carry Forward Exceed AmountOfLossCarryForwardRelinquishByWhichLossCarryForwardExceed	3400000000
CY2010Q4	ambc	Reduction In Tax Net Operating Losses On Credit Default Contracts ReductionInTaxNetOperatingLossesOnCreditDefaultContracts	3400000000
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-3149533000
CY2011Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	2028479000
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15999000
CY2011Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6230780000
CY2011Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	201317000
CY2012Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4751824000
CY2012Q4	us-gaap	Other Assets OtherAssets	39715000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	77715000
CY2012Q4	us-gaap	Deferred Income Taxes And Other Liabilities Noncurrent DeferredIncomeTaxesAndOtherLiabilitiesNoncurrent	1586000
CY2012Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	5472000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding	316	Policies
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-3246967000
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	6329832000
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	73264000
CY2012Q4	us-gaap	Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts	6619486000
CY2012Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	77715000
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	625385000
CY2012Q4	us-gaap	Liabilities Subject To Compromise Debt And Accrued Interest LiabilitiesSubjectToCompromiseDebtAndAccruedInterest	1690312000
CY2012Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1620621000
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-6297264000
CY2012Q4	us-gaap	Assets Assets	27085265000
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	728286000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	455626000
CY2012Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	39742000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding	33303553000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue	603794000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest	9243183000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability	6122140000
CY2012Q4	us-gaap	Minority Interest MinorityInterest	660560000
CY2012Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	271251000
CY2012Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	180113000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	70164000
CY2012Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1620621000
CY2012Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	5926000
CY2012Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	261203000
CY2012Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	96778000
CY2012Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	159086000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability	9981831000
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	27085265000
CY2012Q4	us-gaap	Borrowings Under Guaranteed Investment Agreements BorrowingsUnderGuaranteedInvestmentAgreements	356091000
CY2012Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	199160000
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	3080000
CY2012Q4	us-gaap	Notional Amount Of Credit Risk Derivatives NotionalAmountOfCreditRiskDerivatives	11281777000
CY2012Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	6122140000
CY2012Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	228835000
CY2012Q4	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	51	Transactions
CY2012Q4	us-gaap	Investment Related Liabilities InvestmentRelatedLiabilities	25000
CY2012Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	14557000
CY2012Q4	us-gaap	Liabilities Liabilities	30332232000
CY2012Q4	us-gaap	Derivative Assets DerivativeAssets	126106000
CY2012Q4	us-gaap	Investments Investments	6329932000
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	150170000
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	102488000
CY2012Q4	us-gaap	Cash Cash	43837000
CY2012Q4	us-gaap	Liabilities Subject To Compromise Other Liabilities LiabilitiesSubjectToCompromiseOtherLiabilities	14592000
CY2012Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	5974731000
CY2012Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	17841863000
CY2012Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	7551000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	682874000
CY2012Q4	us-gaap	Liabilities Subject To Compromise LiabilitiesSubjectToCompromise	1704904000
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	410755000
CY2012Q4	us-gaap	Reinsurance Payable ReinsurancePayable	94527000
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	73264000
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	213585000
CY2012Q4	us-gaap	Other Investments OtherInvestments	100000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable	159086000
CY2012Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	17661700000
CY2012Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	265779000
CY2012Q4	us-gaap	Other Receivables OtherReceivables	761000
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2172027000
CY2012Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability	6587826000
CY2012Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	661658000
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5402395000
CY2012Q4	us-gaap	Unearned Premiums UnearnedPremiums	2778401000
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	227248000
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	-3907527000
CY2012Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	177893000
CY2012Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	183300000
CY2012Q4	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	497346000
CY2012Q4	us-gaap	Notes Receivable Net NotesReceivableNet	9203000
CY2012Q4	ambc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	455626000
CY2012Q4	ambc	Securities Continuous Unrealized Loss Position Fair Value SecuritiesContinuousUnrealizedLossPositionFairValue	684068000
CY2012Q4	ambc	Subrogation Recoverable SubrogationRecoverable	497346000
CY2012Q4	ambc	Other Short Term Investments Amortized Cost OtherShortTermInvestmentsAmortizedCost	661219000
CY2012Q4	ambc	Amortized Cost On Investment AmortizedCostOnInvestment	5678560000
CY2012Q4	ambc	Available For Sale Securities Pledged As Collateral Amortized Cost Basis AvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	265517000
CY2012Q4	ambc	Available For Sale Securities Pledged As Collateral Gross Unrealized Gain AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	262000
CY2012Q4	ambc	Available For Sale Securities Pledged As Collateral Gross Unrealized Losses AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses
CY2012Q4	ambc	Estimated Future Premium Payments Weighted Average Discounted Rate EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate	0.076	pure
CY2012Q4	ambc	Fair Value Of Securities Deposited With Governmental Authorities FairValueOfSecuritiesDepositedWithGovernmentalAuthorities	6945000
CY2012Q4	ambc	Gross Unrealized Gains On Investment GrossUnrealizedGainsOnInvestment	728987000
CY2012Q4	ambc	Gross Unrealized Loss On Investment GrossUnrealizedLossOnInvestment	77715000
CY2012Q4	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateral	6064053000
CY2012Q4	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral Amortized Cost Basis InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	5413043000
CY2012Q4	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Gain InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	728725000
CY2012Q4	ambc	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Losses InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses	77715000
CY2012Q4	ambc	Liabilities Subject To Compromise Including Subsidiaries Liability LiabilitiesSubjectToCompromiseIncludingSubsidiariesLiability	1704939000
CY2012Q4	ambc	Liabilities Subject To Compromise Payable To Non Debtor Subsidiaries LiabilitiesSubjectToCompromisePayableToNonDebtorSubsidiaries	35000
CY2012Q4	ambc	Loss Reserves Ceded To Reinsurers LossReservesCededToReinsurers	147409000
CY2012Q4	ambc	Non Credit Other Than Temporary Impairments On Investments NonCreditOtherThanTemporaryImpairmentsOnInvestments	6892000
CY2012Q4	ambc	Number Of Remediation Transactions NumberOfRemediationTransactions	49	Transactions
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Discount On Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability	2138631000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability	12120462000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation	36949000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation	870780000
CY2012Q4	ambc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	70164000
CY2012	ambc	Liability For Unpaid Claims And Claims Adjustment Expense Change In Previously Established Loss Reserves Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInPreviouslyEstablishedLossReservesPriorYears	72700000
CY2012Q4	ambc	Securities Held To Collateralize And Fund Repayment Of Debt Issued Through Resecuritization Transaction Fair Value SecuritiesHeldToCollateralizeAndFundRepaymentOfDebtIssuedThroughResecuritizationTransactionFairValue	201329000
CY2012Q4	ambc	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	7551000
CY2012Q4	ambc	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	228442000
CY2012Q4	ambc	Subrogation Recoverable Included In Loss And Loss Expense Reserves SubrogationRecoverableIncludedInLossAndLossExpenseReserves	2611430000
CY2012	ambc	Liability For Unpaid Claims And Claims Adjustment Expense Change In Established Subrogation Recoveries Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInEstablishedSubrogationRecoveriesPriorYears	-172818000
CY2012Q4	ambc	Reserve For Loss Adjustment Expenses ReserveForLossAdjustmentExpenses	136790000
CY2012Q4	ambc	Balance Of Gross Rmbs Subrogation Recoveries BalanceOfGrossRmbsSubrogationRecoveries	2523225000
CY2012Q4	ambc	Balance Of Rmbs Subrogation Recoveries Net Of Reinsurance BalanceOfRmbsSubrogationRecoveriesNetOfReinsurance	2497233000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Rmbs Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation	2561163000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Rmbs Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation	37938000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation	907729000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Loss Adjustment Expenses Reserve ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve	138108000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation	2523225000
CY2012Q4	ambc	Subrogation Recoverable Asset SubrogationRecoverableAsset	782575000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Rmbs Gross Claim Liabilities Before Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesBeforeSubrogationRecoveries	3563344000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Rmbs Gross Claim Liabilities After Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationRmbsGrossClaimLiabilitiesAfterSubrogationRecoveries	1040119000
CY2012Q4	ambc	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Subrogation Rmbs ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilitySubrogationRmbs	2523225000
CY2012Q4	ambc	Change In Loss And Loss Expense Reserves Net ChangeInLossAndLossExpenseReservesNet	-256049000
CY2012Q4	ambc	Financial And Derivative Assets Gross Recognized Amount FinancialAndDerivativeAssetsGrossRecognizedAmount	199370000
CY2012Q4	ambc	Financial And Derivative Liability Gross Recognized Amount FinancialAndDerivativeLiabilityGrossRecognizedAmount	604579000
CY2012Q4	ambc	Derivative Assets Gross Amount Of Cash Collateral Pledged Not Offset DerivativeAssetsGrossAmountOfCashCollateralPledgedNotOffset
CY2012Q4	ambc	Derivative Assets Net Amount DerivativeAssetsNetAmount	126106000
CY2012Q4	ambc	Derivative Liabilities Gross Amount Of Cash Collateral Pledged Not Offset DerivativeLiabilitiesGrossAmountOfCashCollateralPledgedNotOffset	180113000
CY2012Q4	ambc	Derivative Liabilities Net Amount DerivativeLiabilitiesNetAmount	351202000
CY2012Q4	ambc	Financial Guarantee Insurance Contracts Premium Receivable Deemed Uncollectible FinancialGuaranteeInsuranceContractsPremiumReceivableDeemedUncollectible	118961000
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears	944860000
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear	20765000
CY2012	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Payments Received FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumPaymentsReceived	155626000
CY2012	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments	25298000
CY2012	us-gaap	Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod	P13Y
CY2012	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	-299906000
CY2012	us-gaap	Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.026	pure
CY2012	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1 FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1	P9Y7M6D
CY2012	us-gaap	Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Amount CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAmount	-699342000
CY2012	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P3Y7M6D
CY2012	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAccretionOfDiscountOnPremiumReceivable	50407000
CY2012	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	-28031000
CY2012	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsCurrentYear	464058000
CY2012	ambc	Derivatives Credit Risk Valuation Adjustment Derivative Liabilities Other Than Credit Derivatives DerivativesCreditRiskValuationAdjustmentDerivativeLiabilitiesOtherThanCreditDerivatives	121928000
CY2012	ambc	Liability For Unpaid Claims And Claims Adjustment Expense Change In Loss Reserves Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesCurrentYear	443293000
CY2012	ambc	Percentage Of Premiums Receivable Related To Non Investment Grade Rmbs Transactions PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeRmbsTransactions	0.07	pure
CY2012	ambc	Percentage Of Premiums Receivable Related To Student Loan Transactions PercentageOfPremiumsReceivableRelatedToStudentLoanTransactions	0.09	pure
CY2012	ambc	Percentage Premiums Receivable Related To Transactions With Non Investment Grade Internal Ratings PercentagePremiumsReceivableRelatedToTransactionsWithNonInvestmentGradeInternalRatings	0.40	pure
CY2013Q1	us-gaap	Assumed Premiums Earned Financial Guarantee Insurance Contracts AssumedPremiumsEarnedFinancialGuaranteeInsuranceContracts	24000
CY2012	ambc	Percentage Premiums Receivable Related To Asset Backed Transactions PercentagePremiumsReceivableRelatedToAssetBackedTransactions	0.15	pure
CY2013Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2013Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013Q1	dei	Document Type DocumentType	10-Q
CY2013Q1	dei	Document Period End Date DocumentPeriodEndDate	2013-03-31
CY2013Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000874501
CY2013Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q1	dei	Trading Symbol TradingSymbol	AMBC
CY2013Q1	dei	Entity Registrant Name EntityRegistrantName	AMBAC FINANCIAL GROUP INC
CY2013Q1	dei	Amendment Flag AmendmentFlag	false
CY2013Q1	dei	Entity Filer Category EntityFilerCategory	Smaller Reporting Company
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	29360000
CY2013Q1	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0
CY2013Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears	-12365000
CY2013Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-83626000
CY2013Q1	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	46000
CY2013Q1	us-gaap	Ceded Premiums Earned Financial Guarantee Insurance Contracts CededPremiumsEarnedFinancialGuaranteeInsuranceContracts	6847000
CY2013Q1	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-77523000
CY2013Q1	us-gaap	Increase Decrease In Loss And Loss Adjustment Expense Reserve IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve	-78527000
CY2013Q1	us-gaap	Profit Loss ProfitLoss	282252000
CY2013Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-63965000
CY2013Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	229000
CY2013Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	302469516	shares
CY2013Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	Segment
CY2013Q1	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	106274000
CY2013Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear	58000
CY2013Q1	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	34429000
CY2013Q1	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-147095000
CY2013Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-49273000
CY2013Q1	us-gaap	Other Income OtherIncome	9498000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Payments Received FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumPaymentsReceived	35115000
CY2013Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-261000
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	282909000
CY2013Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-41000
CY2013Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	808000
CY2013Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	3881000
CY2013Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	100256000
CY2013Q1	us-gaap	Operating Loss Carryforwards Expiration Dates OperatingLossCarryforwardsExpirationDates	Expiring in 2029 and will fully expire in 2034
CY2013Q1	us-gaap	Contractual Interest Expense On Prepetition Liabilities Not Recognized In Statement Of Operations ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations	20660000
CY2013Q1	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	12787000
CY2013Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	109738	shares
CY2013Q1	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-6854000
CY2013Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	9298000
CY2013Q1	us-gaap	Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod	P12Y
CY2013Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	120603000
CY2013Q1	us-gaap	Reorganization Items ReorganizationItems	2059000
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-808000
CY2013Q1	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	10000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments	-38873000
CY2013Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	9000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	-14524000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.027	pure
CY2013Q1	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	51135000
CY2013Q1	us-gaap	Assumed Premiums Written Financial Guarantee Insurance Contracts AssumedPremiumsWrittenFinancialGuaranteeInsuranceContracts
CY2013Q1	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax
CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	94645000
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
CY2013Q1	us-gaap	Derivative Credit Risk Related Contingent Features Triggering Circumstances DerivativeCreditRiskRelatedContingentFeaturesTriggeringCircumstances	None of our outstanding credit derivative transactions
CY2013Q1	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	42421000
CY2013Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	727000
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	282299000
CY2013Q1	us-gaap	Direct Premiums Written Financial Guarantee Insurance Contracts DirectPremiumsWrittenFinancialGuaranteeInsuranceContracts	3530000
CY2013Q1	us-gaap	Net Investment Income NetInvestmentIncome	85069000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1 FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1	P9Y9M18D
CY2013Q1	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	1422000
CY2013Q1	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	1740000
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2013Q1	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div> <p><font size="2">Below is the loss reserve roll-forward, net of subrogation recoverable and reinsurance for the three months ended March 31, 2013 and the year ended December 31, 2012:</font></p> <p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; FONT-SIZE: 12px">  </p> <table style="BORDER-COLLAPSE: collapse" border="0" cellspacing="0" cellpadding="0" width="76%" align="center"> <!-- Begin Table Head --> <tr> <td width="66%"></td> <td valign="bottom" width="9%"></td> <td></td> <td></td> <td></td> <td valign="bottom" width="9%"></td> <td></td> <td></td> <td></td> </tr> <tr> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font size="1">  </font></td> <td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Three Months Ended</b></font><br /> <font style="FONT-FAMILY: Times New Roman" size="1"><b>March  31,<br /> 2013</b></font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font size="1"> </font></td> <td style="BORDER-BOTTOM: #000000 1px solid" valign="bottom" colspan="2" align="center"><font style="FONT-FAMILY: Times New Roman" size="1"><b>Year Ended<br /> December 31,<br /> 2012</b></font></td> <td valign="bottom"><font size="1"> </font></td> </tr> <!-- End Table Head --><!-- Begin Table Body --> <tr bgcolor="#CCEEFF"> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Beginning balance of loss and loss expense reserves, net of subrogation recoverable and reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,974,731</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6,230,780</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> </tr> <tr style="FONT-SIZE: 1px"> <td valign="bottom"></td> <td valign="bottom">  </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> </tr> <tr> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Changes in the loss and loss expense reserves due to:</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"></td> </tr> <tr bgcolor="#CCEEFF"> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Current year:</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"></td> </tr> <tr> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 5em"><font style="FONT-FAMILY: Times New Roman" size="2">Establishment of new loss and loss expense reserves, gross of RMBS subrogation and net of reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,083</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">464,058</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> </tr> <tr bgcolor="#CCEEFF"> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 5em"><font style="FONT-FAMILY: Times New Roman" size="2">Paid claims and loss expenses, net of subrogation and reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(58</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(20,765</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> </tr> <tr> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 5em"><font style="FONT-FAMILY: Times New Roman" size="2">Establishment of RMBS subrogation recoveries, net of reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(188</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">)</font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">—  </font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> </tr> <tr style="FONT-SIZE: 1px"> <td valign="bottom"></td> <td valign="bottom">  </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> </tr> <tr bgcolor="#CCEEFF"> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 7em"><font style="FONT-FAMILY: Times New Roman" size="2">Total current year</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">3,837</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">443,293</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> </tr> <tr style="FONT-SIZE: 1px"> <td valign="bottom"></td> <td valign="bottom">  </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> </tr> <tr> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Prior years:</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"></td> <td valign="bottom"></td> <td valign="bottom"></td> </tr> <tr bgcolor="#CCEEFF"> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 5em"><font style="FONT-FAMILY: Times New Roman" size="2">Change in previously established loss and loss expense reserves, gross of RMBS subrogation and net of reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(129,090</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">72,700</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> </tr> <tr> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 5em"><font style="FONT-FAMILY: Times New Roman" size="2">Paid claims and loss expenses, net of subrogation and reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">12,365</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(944,860</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> </tr> <tr bgcolor="#CCEEFF"> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 5em"><font style="FONT-FAMILY: Times New Roman" size="2">Change in previously established RMBS subrogation recoveries, net of reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">34,617</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">172,818</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> </tr> <tr style="FONT-SIZE: 1px"> <td valign="bottom"></td> <td valign="bottom">  </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> </tr> <tr> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 7em"><font style="FONT-FAMILY: Times New Roman" size="2">Total prior years</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(82,108</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(699,342</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> </tr> <tr style="FONT-SIZE: 1px"> <td valign="bottom"></td> <td valign="bottom">  </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> </tr> <tr bgcolor="#CCEEFF"> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Net change in loss and loss expense reserves</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(78,271</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2"> </font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">(256,049</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">) </font></td> </tr> <tr style="FONT-SIZE: 1px"> <td valign="bottom"></td> <td valign="bottom">  </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 1px solid"> </p> </td> <td> </td> </tr> <tr> <td valign="top"> <p style="TEXT-INDENT: -1em; MARGIN-LEFT: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Ending loss and loss expense reserves, net of subrogation recoverable and reinsurance</font></p> </td> <td valign="bottom"><font size="1">  </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,896,460</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">5,974,731</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> </tr> <tr style="FONT-SIZE: 1px"> <td valign="bottom"></td> <td valign="bottom">  </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 3px double"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 3px double"> </p> </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 3px double"> </p> </td> <td valign="bottom"> <p style="BORDER-TOP: #000000 3px double"> </p> </td> <td> </td> </tr> </table> </div>
CY2013Q1	us-gaap	Ceded Premiums Written Financial Guarantee Insurance Contracts CededPremiumsWrittenFinancialGuaranteeInsuranceContracts	1014000
CY2013Q1	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-5798000
CY2013Q1	us-gaap	Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Amount CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAmount	-82108000
CY2013Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	302579254	shares
CY2013Q1	us-gaap	Direct Premiums Earned Financial Guarantee Insurance Contracts DirectPremiumsEarnedFinancialGuaranteeInsuranceContracts	107079000
CY2013Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4067000
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	6082000
CY2013Q1	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P3Y6M
CY2013Q1	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	41578000
CY2013Q1	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	2049000
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	376985000
CY2013Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	255664000
CY2013Q1	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	-569000
CY2013Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	17543000
CY2013Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	23165000
CY2013Q1	us-gaap	Revenues Revenues	291427000
CY2013Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4800000
CY2013Q1	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	100256000
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	657000
CY2013Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	60000
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	94098000
CY2013Q1	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-512000
CY2013Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	10278000
CY2013Q1	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-2442000
CY2013Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-47000
CY2013Q1	us-gaap	Revenue From Administrative Services Other RevenueFromAdministrativeServicesOther	291427000
CY2013Q1	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	46060000
CY2013Q1	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAccretionOfDiscountOnPremiumReceivable	11190000
CY2013Q1	us-gaap	Allowance For Doubtful Accounts Receivable Period Increase Decrease AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease	-201000
CY2013Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	243006000
CY2013Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-20508000
CY2013Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	113712000
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	376897000
CY2013Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	46060000
CY2013Q1	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	496000
CY2013Q1	us-gaap	Premiums Written Net Financial Guarantee Insurance Contracts PremiumsWrittenNetFinancialGuaranteeInsuranceContracts	2516000
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0
CY2013Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	77330000
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	6082000
CY2013Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsCurrentYear	4083000
CY2013Q1	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	318000
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostBeforeTax	1707000
CY2013Q1	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	85612000
CY2013Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	6459000
CY2013Q1	ambc	Assets Transferred To Special Purpose Entities AssetsTransferredToSpecialPurposeEntities	1455000
CY2013Q1	ambc	Premiums Written Gross PremiumsWrittenGross	-3530000
CY2013Q1	ambc	Other Investment Income OtherInvestmentIncome	543000
CY2013Q1	ambc	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	46060000
CY2013Q1	ambc	Stock Based Compensation StockBasedCompensation	60000
CY2013Q1	ambc	Investment Income Interest On Debt Securities InvestmentIncomeInterestOnDebtSecurities	86331000
CY2013Q1	ambc	Investment Income Interest On Loans Receivable InvestmentIncomeInterestOnLoansReceivable	108000
CY2013Q1	ambc	Common Stock Voting Rights Percentage CommonStockVotingRightsPercentage	0.10	pure
CY2013Q1	ambc	Other Investments Income OtherInvestmentsIncome	-543000
CY2013Q1	ambc	Income Loss From Continuing Operations Before Reorganization Items And Income Taxes IncomeLossFromContinuingOperationsBeforeReorganizationItemsAndIncomeTaxes	284968000
CY2013Q1	ambc	Percentage Of Beneficial Ownership PercentageOfBeneficialOwnership	0.05	pure
CY2013Q1	ambc	Realized Gains Losses And Other Settlements RealizedGainsLossesAndOtherSettlements	2509000
CY2013Q1	ambc	Unrealized Gains Losses UnrealizedGainsLosses	10278000
CY2013Q1	ambc	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	4067000
CY2013Q1	ambc	Interest Paid On Investment Agreements InterestPaidOnInvestmentAgreements	1724000
CY2013Q1	ambc	Increase Decrease Variable Interest Entity Activities IncreaseDecreaseVariableInterestEntityActivities	38326000
CY2013Q1	ambc	Income Loss On Variable Interest Entities IncomeLossOnVariableInterestEntities	38326000
CY2013Q1	ambc	Amount Received Under Derivatives With Sponsored Special Purpose Entities AmountReceivedUnderDerivativesWithSponsoredSpecialPurposeEntities	93000
CY2013Q1	ambc	Available For Sale Securities Continuous Unrealized Loss Position Period Twelve Months Or Longer Aggregate Losses By Issuance By Large Diversified Financial Services AvailableForSaleSecuritiesContinuousUnrealizedLossPositionPeriodTwelveMonthsOrLongerAggregateLossesByIssuanceByLargeDiversifiedFinancialServices	P69M
CY2013Q1	ambc	Available For Sale Securities Continuous Unrealized Loss Position Period Twelve Months Or Longer Aggregate Losses Secured By Lease Payments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionPeriodTwelveMonthsOrLongerAggregateLossesSecuredByLeasePayments	P63M
CY2013Q1	ambc	Derivatives Credit Risk Valuation Adjustment Derivative Liabilities Other Than Credit Derivatives DerivativesCreditRiskValuationAdjustmentDerivativeLiabilitiesOtherThanCreditDerivatives	91781000
CY2013Q1	ambc	Fair Value Measurement Process Description For Credit Derivatives Hypothetical Incremental Fee FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFee	0.0005	pure
CY2013Q1	ambc	Fair Value Measurement Process Description For Credit Derivatives Hypothetical Incremental Fee With Credit Deterioration FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFeeWithCreditDeterioration	0.0015	pure
CY2013Q1	ambc	Fair Value Measurement Process Description For Credit Derivatives Remaining Life FairValueMeasurementProcessDescriptionForCreditDerivativesRemainingLife	P8Y
CY2013Q1	ambc	Fair Value Measurement Process Description For Credit Derivatives Revised Relative Change Ratio FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedRelativeChangeRatio	0.732	pure
CY2013Q1	ambc	Insurance Premium Earned Related To Sponsored Special Purpose Entities InsurancePremiumEarnedRelatedToSponsoredSpecialPurposeEntities	30000
CY2013Q1	ambc	Interest Paid On Variable Interest Entity Secured Borrowing InterestPaidOnVariableInterestEntitySecuredBorrowing	218000
CY2013Q1	ambc	Liability For Unpaid Claims And Claims Adjustment Expense Change In Loss Reserves Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesCurrentYear	3837000
CY2013Q1	ambc	Liability For Unpaid Claims And Claims Adjustment Expense Establishment Of Subrogation Recoveries Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseEstablishmentOfSubrogationRecoveriesCurrentYear	188000
CY2013Q1	ambc	Net Change In Fair Value Of Credit Derivatives NetChangeInFairValueOfCreditDerivatives	12787000
CY2013Q1	ambc	Net Par Exposure For Policies Allocated To Segregated Account NetParExposureForPoliciesAllocatedToSegregatedAccount	26122693000
CY2013Q1	ambc	Operating Tax Carryforward Expiration Year End OperatingTaxCarryforwardExpirationYearEnd	2034
CY2013Q1	ambc	Operating Tax Carryforward Expiration Year Start OperatingTaxCarryforwardExpirationYearStart	2029
CY2013Q1	ambc	Payment As Percentage Of Permitted Policy Claim PaymentAsPercentageOfPermittedPolicyClaim	0.25	pure
CY2013Q1	ambc	Percentage Of Credit Derivative Gross Par Outstanding Using Internally Estimated Reference Obligation Prices In Determination Of Fair Value PercentageOfCreditDerivativeGrossParOutstandingUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue	0.20	pure
CY2013Q1	ambc	Percentage Of Credit Derivative Liability Using Internally Estimated Reference Obligation Prices In Determination Of Fair Value PercentageOfCreditDerivativeLiabilityUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue	0.24	pure
CY2013Q1	ambc	Percentage Of Credit Derivatives Gross Par Outstanding Using Third Party Reference Obligation Quotes In Determination Of Fair Value PercentageOfCreditDerivativesGrossParOutstandingUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue	0.80	pure
CY2013Q1	ambc	Percentage Of Credit Derivatives Liability Using Third Party Reference Obligation Quotes In Determination Of Fair Value PercentageOfCreditDerivativesLiabilityUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue	0.76	pure
CY2013Q1	ambc	Percentage Of Premiums Receivable Related To Non Investment Grade Rmbs Transactions PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeRmbsTransactions	0.07	pure
CY2013Q1	ambc	Percentage Of Premiums Receivable Related To Student Loan Transactions PercentageOfPremiumsReceivableRelatedToStudentLoanTransactions	0.09	pure
CY2013Q1	ambc	Percentage Premiums Receivable Related To Transactions With Non Investment Grade Internal Ratings PercentagePremiumsReceivableRelatedToTransactionsWithNonInvestmentGradeInternalRatings	0.40	pure
CY2013Q1	ambc	Professional Fees Paid Relating To Chapter Eleven Proceeding ProfessionalFeesPaidRelatingToChapterElevenProceeding	3246000
CY2013Q1	ambc	Profit Loss Before Tax From Unaffiliated Customer ProfitLossBeforeTaxFromUnaffiliatedCustomer	282909000
CY2012Q1	us-gaap	Increase Decrease In Loss And Loss Adjustment Expense Reserve IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve	9785000
CY2013Q1	ambc	Weighted Average Rating Of Assets Held By Sponsored Special Purpose Entities WeightedAverageRatingOfAssetsHeldBySponsoredSpecialPurposeEntities	No longer than 90 days
CY2013Q1	ambc	Amounts Recovered On Previously Paid Claims Related To Sponsored Special Purpose Entities AmountsRecoveredOnPreviouslyPaidClaimsRelatedToSponsoredSpecialPurposeEntities	0
CY2013Q1	ambc	Investment Income Insurance Entity Short Term Investments InvestmentIncomeInsuranceEntityShortTermInvestments	595000
CY2013Q1	ambc	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Taxes OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTaxes	0
CY2013Q1	ambc	Other Comprehensive Income Loss Before Reclassification Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationNetOfTax	99960000
CY2013Q1	ambc	Insurance Liabilities Not Assumed InsuranceLiabilitiesNotAssumed	159451000
CY2013Q1	ambc	Liability For Unpaid Claims And Claims Adjustment Expense Change In Previously Established Loss Reserves Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInPreviouslyEstablishedLossReservesPriorYears	-129090000
CY2013Q1	ambc	Liability For Unpaid Claims And Claims Adjustment Expense Change In Established Subrogation Recoveries Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInEstablishedSubrogationRecoveriesPriorYears	-34617000
CY2013Q1	ambc	Loss Adjustment Expense Incurred LossAdjustmentExpenseIncurred	51135000
CY2013Q1	ambc	Additional Transactions Reviewed Changes In Rmbs Subrogation AdditionalTransactionsReviewedChangesInRmbsSubrogation
CY2013Q1	ambc	Additional Adverse Sample Loans Reviewed Change In Rmbs Subrogation AdditionalAdverseSampleLoansReviewedChangeInRmbsSubrogation
CY2013Q1	ambc	Other Changes Rmbs Subrogation OtherChangesRmbsSubrogation	18339000
CY2013Q1	ambc	Amounts Reclassified From Accumulated Other Comprehensive Income Loss Net Of Tax AmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossNetOfTax	-5274000
CY2013Q1	ambc	Impact Of Sponsor Actions In Residential Mortgage Backed Securities Subrogation ImpactOfSponsorActionsInResidentialMortgageBackedSecuritiesSubrogation	-54195000
CY2013Q1	ambc	Percentage Premiums Receivable Related To Asset Backed Transactions PercentagePremiumsReceivableRelatedToAssetBackedTransactions	0.15	pure
CY2013Q1	ambc	Other Comprehensive Income Loss Excluding Noncontrolling Interest Net Of Tax OtherComprehensiveIncomeLossExcludingNoncontrollingInterestNetOfTax	94686000
CY2013Q1	ambc	Net Reclassifications For Period NetReclassificationsForPeriod	5274000
CY2012Q1	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	15790000
CY2012Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	183923000
CY2012Q1	us-gaap	Ceded Premiums Earned Financial Guarantee Insurance Contracts CededPremiumsEarnedFinancialGuaranteeInsuranceContracts	2223000
CY2012Q1	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-110943000
CY2012Q1	us-gaap	Other Income OtherIncome	64793000
CY2012Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	114269	shares
CY2012Q1	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-4509000
CY2012Q1	us-gaap	Profit Loss ProfitLoss	253322000
CY2012Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8718000
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	302466328	shares
CY2012Q1	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	110751000
CY2012Q1	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	36534000
CY2012Q1	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-146928000
CY2012Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	144524000
CY2012Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3213000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	253622000
CY2012Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	31000
CY2012Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	12518000
CY2012Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	94950000
CY2012Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	2609000
CY2012Q1	us-gaap	Contractual Interest Expense On Prepetition Liabilities Not Recognized In Statement Of Operations ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations	24162000
CY2012Q1	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-7222000
CY2012Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	23932000
CY2012Q1	us-gaap	Assumed Premiums Earned Financial Guarantee Insurance Contracts AssumedPremiumsEarnedFinancialGuaranteeInsuranceContracts	25000
CY2012Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	3792000
CY2012Q1	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	20000
CY2012Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	35024000
CY2012Q1	us-gaap	Reorganization Items ReorganizationItems	2461000
CY2012Q1	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	2320000
CY2012Q1	us-gaap	Assumed Premiums Written Financial Guarantee Insurance Contracts AssumedPremiumsWrittenFinancialGuaranteeInsuranceContracts
CY2012Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-17431000
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2012Q1	us-gaap	Fair Value Inputs Long Term Net Of Tax Operating Income Margin Percent FairValueInputsLongTermNetOfTaxOperatingIncomeMarginPercent	0.20	pure
CY2012Q1	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	64542000
CY2012Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	820000
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	253320000
CY2012Q1	us-gaap	Direct Premiums Written Financial Guarantee Insurance Contracts DirectPremiumsWrittenFinancialGuaranteeInsuranceContracts	92594000
CY2012Q1	us-gaap	Net Investment Income NetInvestmentIncome	112117000
CY2012Q1	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	1064000
CY2012Q1	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	41046000
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2012Q1	us-gaap	Ceded Premiums Written Financial Guarantee Insurance Contracts CededPremiumsWrittenFinancialGuaranteeInsuranceContracts	16854000
CY2012Q1	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-5497000
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	302580597	shares
CY2012Q1	us-gaap	Direct Premiums Earned Financial Guarantee Insurance Contracts DirectPremiumsEarnedFinancialGuaranteeInsuranceContracts	97148000
CY2012Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-7700000
CY2012Q1	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	94950000
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	300000
CY2012Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	338000
CY2012Q1	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	824000
CY2012Q1	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	2441000
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	235858000
CY2012Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	208133000
CY2012Q1	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	46957000
CY2012Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	26684000
CY2012Q1	us-gaap	Interest Expense Debt InterestExpenseDebt	33839000
CY2012Q1	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	3071000
CY2012Q1	us-gaap	Revenues Revenues	324136000
CY2012Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-111000
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-16852000
CY2012Q1	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	247000
CY2012Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-10476000
CY2012Q1	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-15912000
CY2012Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2000
CY2012Q1	us-gaap	Revenue From Administrative Services Other RevenueFromAdministrativeServicesOther	324136000
CY2012Q1	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	392000
CY2012Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	182008000
CY2012Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-85000
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	235891000
CY2012Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	392000
CY2012Q1	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	462000
CY2012Q1	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	300000
CY2012Q1	us-gaap	Premiums Written Net Financial Guarantee Insurance Contracts PremiumsWrittenNetFinancialGuaranteeInsuranceContracts	75740000
CY2012Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	40350000
CY2012Q1	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	321000
CY2012Q1	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	112117000
CY2012Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	68053000
CY2012Q1	ambc	Assets Transferred To Special Purpose Entities AssetsTransferredToSpecialPurposeEntities	134000
CY2012Q1	ambc	Payments From Drawdowns Of Borrowings Under Guaranteed Investment Agreements PaymentsFromDrawdownsOfBorrowingsUnderGuaranteedInvestmentAgreements	420000
CY2012Q1	ambc	Premiums Written Gross PremiumsWrittenGross	-92594000
CY2012Q1	ambc	Other Than Temporary Impairment Losses OtherThanTemporaryImpairmentLosses	4604000
CY2012Q1	ambc	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	392000
CY2012Q1	ambc	Net Other Than Temporary Impairment Losses Recognized In Earnings NetOtherThanTemporaryImpairmentLossesRecognizedInEarnings	-3071000
CY2012Q1	ambc	Stock Based Compensation StockBasedCompensation	338000
CY2012Q1	ambc	Investment Income Interest On Debt Securities InvestmentIncomeInterestOnDebtSecurities	112652000
CY2012Q1	ambc	Investment Income Interest On Loans Receivable InvestmentIncomeInterestOnLoansReceivable	216000
CY2012Q1	ambc	Income Loss From Continuing Operations Before Reorganization Items And Income Taxes IncomeLossFromContinuingOperationsBeforeReorganizationItemsAndIncomeTaxes	256083000
CY2012Q1	ambc	Realized Gains Losses And Other Settlements RealizedGainsLossesAndOtherSettlements	3254000
CY2012Q1	ambc	Loss Adjustment Expense Incurred LossAdjustmentExpenseIncurred	2320000
CY2012Q1	ambc	Unrealized Gains Losses UnrealizedGainsLosses	-10476000
CY2012Q1	ambc	Portion Of Loss Recognized In Other Comprehensive Income PortionOfLossRecognizedInOtherComprehensiveIncome	-1533000
CY2012Q1	ambc	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	7280000
CY2012Q1	ambc	Interest Paid On Investment Agreements InterestPaidOnInvestmentAgreements	3072000
CY2012Q1	ambc	Increase Decrease Variable Interest Entity Activities IncreaseDecreaseVariableInterestEntityActivities	15220000
CY2012Q1	ambc	Income Loss On Variable Interest Entities IncomeLossOnVariableInterestEntities	15220000
CY2012Q1	ambc	Amount Received Under Derivatives With Sponsored Special Purpose Entities AmountReceivedUnderDerivativesWithSponsoredSpecialPurposeEntities	138000
CY2012Q1	ambc	Insurance Premium Earned Related To Sponsored Special Purpose Entities InsurancePremiumEarnedRelatedToSponsoredSpecialPurposeEntities	145000
CY2012Q1	ambc	Interest Paid On Variable Interest Entity Secured Borrowing InterestPaidOnVariableInterestEntitySecuredBorrowing	429000
CY2012Q1	ambc	Net Change In Fair Value Of Credit Derivatives NetChangeInFairValueOfCreditDerivatives	-7222000
CY2012Q1	ambc	Professional Fees Paid Relating To Chapter Eleven Proceeding ProfessionalFeesPaidRelatingToChapterElevenProceeding	1641000
CY2012Q1	ambc	Profit Loss Before Tax From Unaffiliated Customer ProfitLossBeforeTaxFromUnaffiliatedCustomer	253622000
CY2012Q1	ambc	Investment Income Insurance Entity Short Term Investments InvestmentIncomeInsuranceEntityShortTermInvestments	313000

Files In Submission

Name	View Source	Status
0001193125-13-222662-index-headers.html	Edgar Link	pending
0001193125-13-222662-index.html	Edgar Link	pending
0001193125-13-222662.txt	Edgar Link	pending
0001193125-13-222662-xbrl.zip	Edgar Link	pending
ambc-20130331.xml	Edgar Link	completed
ambc-20130331.xsd	Edgar Link	pending
ambc-20130331_cal.xml	Edgar Link	unprocessable
ambc-20130331_def.xml	Edgar Link	unprocessable
ambc-20130331_lab.xml	Edgar Link	unprocessable
ambc-20130331_pre.xml	Edgar Link	unprocessable
d512246d10q.htm	Edgar Link	pending
d512246dex311.htm	Edgar Link	pending
d512246dex312.htm	Edgar Link	pending
d512246dex321.htm	Edgar Link	pending
d512246dex322.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc

2013 Q2 Form 10-Q Financial Statement

#000119312513222662 Filed on May 15, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC AMBAC FINANCIAL GROUP INC Stock $ambc

2013 Q2 Form 10-Q Financial Statement

#000119312513222662 Filed on May 15, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc