$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc

$ambc Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-Q Financial Statement

#000119312512470880 Filed on November 14, 2012

Income Statement

Concept	2012 Q4	2012 Q3	2011 Q3
Revenue	$171.7M	$197.2M	$25.72M
YoY Change	-666.67%	666.66%	-93.04%
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	$800.0K	$800.0K	$700.0K
YoY Change	0.0%	14.29%	-30.0%
% of Gross Profit
Operating Expenses	-$1.100M	$14.60M	-$15.40M
YoY Change	-100.13%	-194.81%	-106.76%
Operating Profit
YoY Change
Interest Expense	-$23.40M	-$23.30M	-$33.10M
YoY Change	-29.31%	-29.61%	-42.33%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$145.4M	$158.0M	-$498.0K
YoY Change	-115.09%	-31834.94%	-100.65%
Income Tax	$2.100M	$667.0K	$75.01M
% Of Pretax Income	1.44%	0.42%
Net Earnings	$143.6M	$157.5M	-$75.51M
YoY Change	-114.91%	-308.65%	-199.35%
Net Earnings / Revenue	83.63%	79.91%	-293.61%
Basic Earnings Per Share		$0.52	-$0.25
Diluted Earnings Per Share	$474.6K	$0.52	-$0.25
COMMON SHARES
Basic Shares Outstanding	302.4M shares	302.5B shares	302.5B shares
Diluted Shares Outstanding		302.6B shares	302.5B shares

Balance Sheet

Concept	2012 Q4	2012 Q3	2011 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$43.84M	$90.07M	$21.32M
Short-Term Investments
Other Short-Term Assets	$178.0M	$191.0M	$229.0M
YoY Change	-19.46%	-16.59%	-28.21%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$179.0M	$201.0M	$265.0M
YoY Change	-30.89%	-24.15%	-22.51%
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$24.17B	$23.80B	$23.45B
YoY Change	3.18%	1.51%	-9.64%
Other Assets	$2.000M	$5.000M	$45.00M
YoY Change	-60.0%	-88.89%	2150.0%
Total Long-Term Assets	$26.91B	$26.75B	$27.36B
YoY Change	0.19%	-2.25%	-11.7%
TOTAL ASSETS
Total Short-Term Assets	$179.0M	$201.0M	$265.0M
Total Long-Term Assets	$26.91B	$26.75B	$27.36B
Total Assets	$27.09B	$26.95B	$27.63B
YoY Change	-0.1%	-2.46%	-11.81%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$232.0M	$211.0M	$142.0M
YoY Change	33.33%	48.59%	54.35%
Deferred Revenue
YoY Change
Short-Term Debt	$531.0M	$456.0M	$457.0M
YoY Change	27.95%	-0.22%	-6.16%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.222B	$1.195B	$1.295B
YoY Change	-0.89%	-7.72%	-14.8%
LONG-TERM LIABILITIES
Long-Term Debt	$15.59B	$15.26B	$14.86B
YoY Change	7.4%	2.7%	-22.44%
Other Long-Term Liabilities	$4.029B	$3.867B	$3.653B
YoY Change	3.25%	5.86%	110.91%
Total Long-Term Liabilities	$19.62B	$19.13B	$18.51B
YoY Change	6.52%	3.32%	-11.38%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.222B	$1.195B	$1.295B
Total Long-Term Liabilities	$19.62B	$19.13B	$18.51B
Total Liabilities	$30.33B	$30.44B	$30.46B
YoY Change	0.23%	-0.08%	-8.25%
SHAREHOLDERS EQUITY
Retained Earnings	-$6.297B	-$6.441B
YoY Change	4.26%
Common Stock	$3.080M	$3.080M
YoY Change	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$410.8M	$410.8M
YoY Change	-0.16%
Treasury Stock Shares	5.581M shares
Shareholders Equity	-$3.908B	-$4.149B	-$2.835B
YoY Change
Total Liabilities & Shareholders Equity	$27.09B	$26.95B	$27.63B
YoY Change	-0.1%	-2.46%	-11.81%

Cashflow Statement

Concept	2012 Q4	2012 Q3	2011 Q3
OPERATING ACTIVITIES
Net Income	$143.6M	$157.5M	-$75.51M
YoY Change	-114.91%	-308.65%	-199.35%
Depreciation, Depletion And Amortization	$800.0K	$800.0K	$700.0K
YoY Change	0.0%	14.29%	-30.0%
Cash From Operating Activities	-$215.7M	-$433.6M	-$8.700M
YoY Change	10.45%	4883.91%	-104.62%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	$229.0M	$507.7M	$14.00M
YoY Change	15.6%	3526.43%	-113.59%
Cash From Investing Activities	$229.0M	$507.7M	$14.00M
YoY Change	15.6%	3526.43%	-113.59%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-59.50M	-33.00M	-1.400M
YoY Change	634.57%	2257.14%	-98.07%
NET CHANGE
Cash From Operating Activities	-215.7M	-433.6M	-8.700M
Cash From Investing Activities	229.0M	507.7M	14.00M
Cash From Financing Activities	-59.50M	-33.00M	-1.400M
Net Change In Cash	-46.20M	41.10M	3.900M
YoY Change	771.7%	953.85%	-70.0%
FREE CASH FLOW
Cash From Operating Activities	-$215.7M	-$433.6M	-$8.700M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	302436107	shares
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CY2011Q2	abk	Junior Surplus Notes JuniorSurplusNotes	36082000
CY2012Q2	us-gaap	Debt Instrument Repurchase Amount DebtInstrumentRepurchaseAmount	789000000
CY2012Q2	abk	Aggregate Payment To Repurchase Surplus Notes AggregatePaymentToRepurchaseSurplusNotes	188000000
CY2011Q2	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability	14095050000
CY2011Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-2180576000
CY2011Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	21316000
CY2011Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	0
CY2011Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	169944000
CY2011Q3	abk	Assets Segment AssetsSegment	27626582000
CY2011Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability	13662565000
CY2012Q2	us-gaap	Debt Instrument Repurchased Face Amount DebtInstrumentRepurchasedFaceAmount	789179000
CY2012Q2	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability	13626233000
CY2012Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4887684000
CY2012Q3	us-gaap	Other Assets OtherAssets	63759000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than One And Within Two Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate	138330000
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1214631000
CY2012Q3	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	95339000
CY2012Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3349056000
CY2012Q3	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	16777000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than25 And Within30 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan25AndWithin30YearsFromBalanceSheetDate	62902000
CY2012Q3	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding	312	Policies
CY2012Q3	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	190320000
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	881664000
CY2012Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-3487513000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than20 And Within25 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan20AndWithin25YearsFromBalanceSheetDate	195106000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Gross Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityGrossOtherSubrogation	720871000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Gross Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityGrossSubrogation	2778645000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than30 And Within35 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan30AndWithin35YearsFromBalanceSheetDate	19306000
CY2012Q3	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	97379000
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	1098182000
CY2012Q3	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0
CY2012Q3	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	97133176000
CY2012Q3	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	95334000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than15 And Within20 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan15AndWithin20YearsFromBalanceSheetDate	340300000
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	527969000
CY2012Q3	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	179438000
CY2012Q3	us-gaap	Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts	7034224000
CY2012Q3	us-gaap	Liabilities Subject To Compromise Debt And Accrued Interest LiabilitiesSubjectToCompromiseDebtAndAccruedInterest	1690312000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than15 And Within20 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan15AndWithin20YearsFromBalanceSheetDate	357079000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1755830000
CY2012Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	2500000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Five And Within10 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFiveAndWithin10YearsFromBalanceSheetDate	578474000
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CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Four And Within Five Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate	130297000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Three And Within Four Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate	136275000
CY2012Q3	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue	648402000
CY2012Q3	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest	9363469000
CY2012Q3	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability	6520140000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than30 And Within35 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan30AndWithin35YearsFromBalanceSheetDate	21420000
CY2012Q3	us-gaap	Minority Interest MinorityInterest	661006000
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	1201159000
CY2012Q3	us-gaap	Reserve For Losses And Loss Adjustment Expenses ReserveForLossesAndLossAdjustmentExpenses	138023000
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	933801000
CY2012Q3	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	80767000
CY2012Q3	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1755830000
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CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Fourth Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFourthQuarterFollowingBalanceSheetDate	62992000
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CY2012Q3	us-gaap	Borrowings Under Guaranteed Investment Agreements BorrowingsUnderGuaranteedInvestmentAgreements	397570000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognized	2795002000
CY2012Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	205818000
CY2012Q3	us-gaap	Common Stock Value CommonStockValue	3080000
CY2012Q3	us-gaap	Derivative Liability Fair Value Net1 DerivativeLiabilityFairValueNet1	-52535000
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CY2012Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	6520140000
CY2012Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	210108000
CY2012Q3	us-gaap	Statutory Accounting Practices Statutory Capital And Surplus Required StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired	100000000
CY2012Q3	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	57	Transactions
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than25 And Within30 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan25AndWithin30YearsFromBalanceSheetDate	69794000
CY2012Q3	us-gaap	Investment Related Liabilities InvestmentRelatedLiabilities	15009000
CY2012Q3	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	15021000
CY2012Q3	us-gaap	Liabilities Liabilities	30435405000
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	896968000
CY2012Q3	us-gaap	Derivative Assets DerivativeAssets	97464000
CY2012Q3	us-gaap	Investments Investments	6440117000
CY2012Q3	us-gaap	Long Term Debt LongTermDebt	146909000
CY2012Q3	us-gaap	Other Liabilities OtherLiabilities	98161000
CY2012Q3	us-gaap	Cash Cash	90065000
CY2012Q3	us-gaap	Liabilities Subject To Compromise Other Liabilities LiabilitiesSubjectToCompromiseOtherLiabilities	17096000
CY2012Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6353871000
CY2012Q3	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	17357709000
CY2012Q3	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	14572000
CY2012Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	794874000
CY2012Q3	us-gaap	Liabilities Subject To Compromise LiabilitiesSubjectToCompromise	1707408000
CY2012Q3	us-gaap	Treasury Stock Value TreasuryStockValue	410755000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Two And Within Three Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate	141878000
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CY2012Q3	us-gaap	Preferred Stock Value PreferredStockValue
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	1099250000
CY2012Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	187121000
CY2012Q3	us-gaap	Other Investments OtherInvestments	100000
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	899698000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Five And Within10 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFiveAndWithin10YearsFromBalanceSheetDate	750984000
CY2012Q3	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable	172439000
CY2012Q3	us-gaap	Loss Contingency Settlement Agreement Consideration1 LossContingencySettlementAgreementConsideration1	24600000
CY2012Q3	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	17175143000
CY2012Q3	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	285860000
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CY2012Q3	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	514084000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than10 And Within15 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan10AndWithin15YearsFromBalanceSheetDate	539033000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than20 And Within25 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan20AndWithin25YearsFromBalanceSheetDate	199914000
CY2012Q3	us-gaap	Other Receivables OtherReceivables	10005000
CY2012Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2172027000
CY2012Q3	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability	7028802000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than35 And Within40 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan35AndWithin40YearsFromBalanceSheetDate	5325000
CY2012Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	713467000
CY2012Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5440690000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Fourth Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringFourthQuarterFollowingBalanceSheetDate	38490000
CY2012Q3	us-gaap	Unearned Premiums UnearnedPremiums	2985542000
CY2012Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	271941000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than10 And Within15 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan10AndWithin15YearsFromBalanceSheetDate	462155000
CY2012Q3	us-gaap	Stockholders Equity StockholdersEquity	-4148519000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than35 And Within40 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan35AndWithin40YearsFromBalanceSheetDate	6236000
CY2012Q3	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	204041000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Expected To Be Collected FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollected	2262894000
CY2012Q3	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	190540000
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	183063000
CY2012Q3	us-gaap	Notes Receivable Net NotesReceivableNet	10380000
CY2012Q3	abk	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	522933000
CY2012Q3	abk	Securities Continuous Unrealized Loss Position Fair Value SecuritiesContinuousUnrealizedLossPositionFairValue	797397000
CY2012Q3	abk	Gross Carrying Amount Of Other Intangible Assets GrossCarryingAmountOfOtherIntangibleAssets	254163000
CY2012Q3	abk	Subrogation Recoverable SubrogationRecoverable	514084000
CY2012Q3	abk	Other Short Term Investments Amortized Cost OtherShortTermInvestmentsAmortizedCost	713137000
CY2012Q3	abk	Insurance Liabilities InsuranceLiabilities	6596843000
CY2012Q3	abk	Other Investments Unrealized Gain Loss OtherInvestmentsUnrealizedGainLoss
CY2012Q3	abk	Aggregate Payment To Repurchase Surplus Notes AggregatePaymentToRepurchaseSurplusNotes	939179000
CY2012Q3	abk	Amortized Cost On Investment AmortizedCostOnInvestment	5886205000
CY2012Q3	abk	Amount Of Surplus Notes That May Be Repurchased Under Stand Alone Derivatives AmountOfSurplusNotesThatMayBeRepurchasedUnderStandAloneDerivatives	500000000
CY2012Q3	abk	Assets Segment AssetsSegment	26947892000
CY2012Q3	abk	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses By Closed Block Life Insurance AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesByClosedBlockLifeInsurance	2879000
CY2012Q3	abk	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses By Issuance By Large Diversified Financial Services AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesByIssuanceByLargeDiversifiedFinancialServices	3846
CY2012Q3	abk	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Related To Alta AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesRelatedToAlta	23867000
CY2012Q3	abk	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Related To Alta Number AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesRelatedToAltaNumber	17	Security
CY2012Q3	abk	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Related To Alta Percentage AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesRelatedToAltaPercentage	0.999	pure
CY2012Q3	abk	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Secured By Lease Payments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesSecuredByLeasePayments	30747000
CY2012Q3	abk	Available For Sale Securities Pledged As Collateral Amortized Cost Basis AvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	285284000
CY2012Q3	abk	Available For Sale Securities Pledged As Collateral Gross Unrealized Gain AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	581000
CY2012Q3	abk	Available For Sale Securities Pledged As Collateral Gross Unrealized Losses AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses	5000
CY2012Q3	abk	Estimated Future Premium Payments Weighted Average Discounted Rate EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate	0.070	pure
CY2012Q3	abk	Fair Value Input Weighted Average Credit Derivative Quote As Percentage Of Notional FairValueInputWeightedAverageCreditDerivativeQuoteAsPercentageOfNotional	0.10	pure
CY2012Q3	abk	Fair Value Input Weighted Average Credit Rating FairValueInputWeightedAverageCreditRating	A
CY2012Q3	abk	Fair Value Input Weighted Average Life FairValueInputWeightedAverageLife	P8Y1M6D
CY2012Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability	13753133000
CY2012Q3	abk	Fair Value Of Securities Deposited With Governmental Authorities FairValueOfSecuritiesDepositedWithGovernmentalAuthorities	7065000
CY2012Q3	abk	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Year Forty Five And Within Fifty Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreYearFortyFiveAndWithinFiftyYearsFromBalanceSheetDate	686000
CY2012Q3	abk	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Year Forty Five And Within Fifty Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanYearFortyFiveAndWithinFiftyYearsFromBalanceSheetDate	242000
CY2012Q3	abk	Gross Unrealized Gains On Investment GrossUnrealizedGainsOnInvestment	649251000
CY2012Q3	abk	Gross Unrealized Loss On Investment GrossUnrealizedLossOnInvestment	95339000
CY2012Q3	abk	Intercompany Escrow IntercompanyEscrow	30000000
CY2012Q3	abk	Investment Other Than Available For Sale Securities Pledged As Collateral InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateral	6154257000
CY2012Q3	abk	Investment Other Than Available For Sale Securities Pledged As Collateral Amortized Cost Basis InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	5600921000
CY2012Q3	abk	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Gain InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	648670000
CY2012Q3	abk	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Losses InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses	95334000
CY2012Q3	abk	Liabilities Subject To Compromise Including Subsidiaries Liability LiabilitiesSubjectToCompromiseIncludingSubsidiariesLiability	1707443000
CY2012Q3	abk	Liabilities Subject To Compromise Payable To Non Debtor Subsidiaries LiabilitiesSubjectToCompromisePayableToNonDebtorSubsidiaries	35000
CY2012Q3	abk	Loss Reserves Ceded To Reinsurers LossReservesCededToReinsurers	166269000
CY2012Q3	abk	Non Credit Other Than Temporary Impairments On Investments NonCreditOtherThanTemporaryImpairmentsOnInvestments	9463000
CY2012Q3	abk	Number Of Samples NumberOfSamples	44	Trial
CY2012Q3	abk	Other Investments Amortized Cost Basis OtherInvestmentsAmortizedCostBasis	100000
CY2012Q3	abk	Parent Company Cash And Short Term Investments ParentCompanyCashAndShortTermInvestments	31459000
CY2012Q3	abk	Payment By Subsidiary To Internal Revenue Service Associated With Net Operating Loss Usage Tier C Under Amended Tax Sharing Agreement PaymentBySubsidiaryToInternalRevenueServiceAssociatedWithNetOperatingLossUsageTierCUnderAmendedTaxSharingAgreement	0.125	pure
CY2012Q3	abk	Payment By Subsidiary To Internal Revenue Service Associated With Net Operating Loss Usage Tier D Under Amended Tax Sharing Agreement PaymentBySubsidiaryToInternalRevenueServiceAssociatedWithNetOperatingLossUsageTierDUnderAmendedTaxSharingAgreement	0.175	pure
CY2012Q3	abk	Percentage Of Credit Value Adjustment PercentageOfCreditValueAdjustment	0.65	pure
CY2012Q3	abk	Premiums Receivable Not Written Off Related To Non Investment Grade Obligation PremiumsReceivableNotWrittenOffRelatedToNonInvestmentGradeObligation	500000
CY2012Q3	abk	Premiums Uncollectible Related To Non Investment Grade Obligation PremiumsUncollectibleRelatedToNonInvestmentGradeObligation	15784000
CY2012Q3	abk	Reduction In Tax Net Operating Losses On Credit Default Contracts ReductionInTaxNetOperatingLossesOnCreditDefaultContracts	3400000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Discount On Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability	2074770000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liabilities After Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiabilitiesAfterSubrogationRecoveries	1202909000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liabilities Before Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiabilitiesBeforeSubrogationRecoveries	3891776000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability	12610749000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation	26592000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnSubrogation	28727000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Gross Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityGrossOtherSubrogation	844902000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Gross Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityGrossSubrogation	2717594000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation	818310000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilitySubrogation	2688867000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reinsurance On Reductions Of Gross Claim Liability Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReinsuranceOnReductionsOfGrossClaimLiabilitySubrogation	2660930000
CY2012Q3	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Loss Adjustment Expenses Reserve ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionLossAdjustmentExpensesReserve	139740000
CY2012Q3	abk	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	80767000
CY2012Q3	abk	Securities Held To Collateralize And Fund Repayment Of Debt Issued Through Resecuritization Transaction Fair Value SecuritiesHeldToCollateralizeAndFundRepaymentOfDebtIssuedThroughResecuritizationTransactionFairValue	194172000
CY2012Q3	abk	Settlement Agreement Surplus Notes Principal Amount Outstanding SettlementAgreementSurplusNotesPrincipalAmountOutstanding	897248000
CY2012Q3	abk	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	14572000
CY2012Q3	abk	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	274464000
CY2012Q3	abk	Subrogation Recoverable Included In Loss And Loss Expense Reserves SubrogationRecoverableIncludedInLossAndLossExpenseReserves	1903348000
CY2012Q3	abk	Subrogation Recoveries Included In Subrogation Recoverable SubrogationRecoveriesIncludedInSubrogationRecoverable	785519000
CY2012Q3	abk	Variable Interest Entity Nonconsolidated Carrying Amount Derivative Net Assets Or Liabilities VariableInterestEntityNonconsolidatedCarryingAmountDerivativeNetAssetsOrLiabilities	177386000
CY2012Q3	abk	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Assets VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets	1968000000
CY2012Q3	abk	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities	8742567000
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-1354228000
CY2010Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	2422596000
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	9497000
CY2010Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	4424450000
CY2010Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	139766000
CY2010Q4	abk	Amount Of Loss Carry Forward Relinquish By Which Loss Carry Forward Exceed AmountOfLossCarryForwardRelinquishByWhichLossCarryForwardExceed	3400000000
CY2010Q4	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability	15874571000
CY2011Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5346897000
CY2011Q4	us-gaap	Other Assets OtherAssets	104300000
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2	144320000
CY2011Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	47421000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding	330	Policies
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-3149533000
CY2011Q4	us-gaap	Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts	7044070000
CY2011Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	95709000
CY2011Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0
CY2011Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	111748270000
CY2011Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	144196000
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	463259000
CY2011Q4	us-gaap	Liabilities Subject To Compromise Debt And Accrued Interest LiabilitiesSubjectToCompromiseDebtAndAccruedInterest	1690312000
CY2011Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	2028479000
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	2500000
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-6039922000
CY2011Q4	us-gaap	Assets Assets	27113695000
CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	627588000
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	516538000
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15999000
CY2011Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	414508000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal	31072226000
CY2011Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	45328000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding	45035585000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue	546520000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest	13963359000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability	6384260000
CY2011Q4	us-gaap	Minority Interest MinorityInterest	663442000
CY2011Q4	us-gaap	Reserve For Losses And Loss Adjustment Expenses ReserveForLossesAndLossAdjustmentExpenses	86171000
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2	114011000
CY2011Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	2028479000
CY2011Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	23500000
CY2011Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	572523000
CY2011Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	159902000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability	10232085000
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	27113695000
CY2011Q4	us-gaap	Borrowings Under Guaranteed Investment Agreements BorrowingsUnderGuaranteedInvestmentAgreements	523046000
CY2011Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	223510000
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	3080000
CY2011Q4	us-gaap	Notional Amount Of Credit Risk Derivatives NotionalAmountOfCreditRiskDerivatives	14166612000
CY2011Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	6384260000
CY2011Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	170169000
CY2011Q4	us-gaap	Derivative Number Of Instruments Held DerivativeNumberOfInstrumentsHeld	68	Transactions
CY2011Q4	us-gaap	Investment Related Liabilities InvestmentRelatedLiabilities	1665000
CY2011Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	16779000
CY2011Q4	us-gaap	Liabilities Liabilities	30263228000
CY2011Q4	us-gaap	Derivative Assets DerivativeAssets	175207000
CY2011Q4	us-gaap	Investments Investments	6876990000
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	223601000
CY2011Q4	us-gaap	Other Liabilities OtherLiabilities	107441000
CY2011Q4	us-gaap	Cash Cash	15999000
CY2011Q4	us-gaap	Liabilities Subject To Compromise Other Liabilities LiabilitiesSubjectToCompromiseOtherLiabilities	17109000
CY2011Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	6230780000
CY2011Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	16543207000
CY2011Q4	us-gaap	Availableforsale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses2 AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2	30309000
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1152502000
CY2011Q4	us-gaap	Liabilities Subject To Compromise LiabilitiesSubjectToCompromise	1707421000
CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	411419000
CY2011Q4	us-gaap	Reinsurance Payable ReinsurancePayable	115555000
CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	190653000
CY2011Q4	us-gaap	Other Investments OtherInvestments	100000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable	159902000
CY2011Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	16379386000
CY2011Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	263530000
CY2011Q4	us-gaap	Other Receivables OtherReceivables	38164000
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2172027000
CY2011Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability	6843487000
CY2011Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	783071000
CY2011Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5830289000
CY2011Q4	us-gaap	Unearned Premiums UnearnedPremiums	3457157000
CY2011Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	635964000
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	-3812975000
CY2011Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	221303000
CY2011Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	201317000
CY2011Q4	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	659810000
CY2011Q4	us-gaap	Notes Receivable Net NotesReceivableNet	18996000
CY2011Q4	abk	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	516538000
CY2011Q4	abk	Securities Continuous Unrealized Loss Position Fair Value SecuritiesContinuousUnrealizedLossPositionFairValue	1158275000
CY2011Q4	abk	Subrogation Recoverable SubrogationRecoverable	659810000
CY2011Q4	abk	Other Short Term Investments Amortized Cost OtherShortTermInvestmentsAmortizedCost	783015000
CY2011Q4	abk	Other Investments Unrealized Gain Loss OtherInvestmentsUnrealizedGainLoss
CY2011Q4	abk	Amortized Cost On Investment AmortizedCostOnInvestment	6391970000
CY2011Q4	abk	Available For Sale Securities Pledged As Collateral Amortized Cost Basis AvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	261958000
CY2011Q4	abk	Available For Sale Securities Pledged As Collateral Gross Unrealized Gain AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	1696000
CY2011Q4	abk	Available For Sale Securities Pledged As Collateral Gross Unrealized Losses AvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses	124000
CY2011Q4	abk	Estimated Future Premium Payments Weighted Average Discounted Rate EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate	0.084	pure
CY2011Q4	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiability	14019216000
CY2011Q4	abk	Fair Value Of Securities Deposited With Governmental Authorities FairValueOfSecuritiesDepositedWithGovernmentalAuthorities	7132000
CY2011Q4	abk	Gross Unrealized Gains On Investment GrossUnrealizedGainsOnInvestment	629341000
CY2011Q4	abk	Gross Unrealized Loss On Investment GrossUnrealizedLossOnInvestment	144321000
CY2011Q4	abk	Investment Other Than Available For Sale Securities Pledged As Collateral InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateral	6613460000
CY2011Q4	abk	Investment Other Than Available For Sale Securities Pledged As Collateral Amortized Cost Basis InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralAmortizedCostBasis	6130012000
CY2011Q4	abk	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Gain InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedGain	627645000
CY2011Q4	abk	Investment Other Than Available For Sale Securities Pledged As Collateral Gross Unrealized Losses InvestmentOtherThanAvailableForSaleSecuritiesPledgedAsCollateralGrossUnrealizedLosses	144197000
CY2011Q4	abk	Liabilities Subject To Compromise Including Subsidiaries Liability LiabilitiesSubjectToCompromiseIncludingSubsidiariesLiability	1707456000
CY2011Q4	abk	Liabilities Subject To Compromise Payable To Non Debtor Subsidiaries LiabilitiesSubjectToCompromisePayableToNonDebtorSubsidiaries	35000
CY2011Q4	abk	Loss Reserves Ceded To Reinsurers LossReservesCededToReinsurers	153480000
CY2011Q4	abk	Non Credit Other Than Temporary Impairments On Investments NonCreditOtherThanTemporaryImpairmentsOnInvestments	20907000
CY2011Q4	abk	Number Of Samples NumberOfSamples	46	Trial
CY2011Q4	abk	Other Investments Amortized Cost Basis OtherInvestmentsAmortizedCostBasis	100000
CY2011Q4	abk	Percentage Of Credit Value Adjustment PercentageOfCreditValueAdjustment	0.75	pure
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Discount On Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability	2279109000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liabilities After Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiabilitiesAfterSubrogationRecoveries	1057315000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liabilities Before Subrogation Recoveries ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiabilitiesBeforeSubrogationRecoveries	3777581000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability	12511194000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation	52539000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnSubrogation	58379000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation	668332000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilitySubrogation	2720266000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Reinsurance On Reductions Of Gross Claim Liability Subrogation ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReinsuranceOnReductionsOfGrossClaimLiabilitySubrogation	2692414000
CY2011Q4	abk	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Loss Adjustment Expenses Reserve ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionLossAdjustmentExpensesReserve	87294000
CY2011Q4	abk	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses	114011000
CY2011Q4	abk	Securities Held To Collateralize And Fund Repayment Of Debt Issued Through Resecuritization Transaction Fair Value SecuritiesHeldToCollateralizeAndFundRepaymentOfDebtIssuedThroughResecuritizationTransactionFairValue	172880000
CY2011Q4	abk	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses	30310000
CY2011Q4	abk	Short Term Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value ShortTermSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	641737000
CY2011Q4	abk	Subrogation Recoverable Included In Loss And Loss Expense Reserves SubrogationRecoverableIncludedInLossAndLossExpenseReserves	1890797000
CY2011Q4	abk	Subrogation Recoveries Included In Subrogation Recoverable SubrogationRecoveriesIncludedInSubrogationRecoverable	829469000
CY2011Q4	abk	Variable Interest Entity Nonconsolidated Carrying Amount Derivative Net Assets Or Liabilities VariableInterestEntityNonconsolidatedCarryingAmountDerivativeNetAssetsOrLiabilities	183666000
CY2011Q4	abk	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Assets VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets	2196161000
CY2011Q4	abk	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities	9207107000
CY2011Q4	abk	Weighted Average Discount Rate Used To Fair Value Options To Repurchase Surplus Notes WeightedAverageDiscountRateUsedToFairValueOptionsToRepurchaseSurplusNotes	0.3657	pure
	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	30096000
	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	58309000
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-787089000
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-319403000
	us-gaap	Increase Decrease In Loss And Loss Adjustment Expense Reserve IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve	-1053373000
	us-gaap	Profit Loss ProfitLoss	-997173000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	29905000
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1991000
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	302429879000	shares
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-167441000
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	105860000
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-451678000
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-253599000
	us-gaap	Other Income OtherIncome	32558000
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	35000
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1829000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-919270000
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-127000
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Instruments Classified In Shareholders Equity Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityGainLossIncludedInEarnings	-577000
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	26634000
	us-gaap	Premiums Earned Net PremiumsEarnedNet	293125000
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	27123000
	us-gaap	Contractual Interest Expense On Prepetition Liabilities Not Recognized In Statement Of Operations ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations	84099000
	us-gaap	Share Based Compensation ShareBasedCompensation	-15459000
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	19889000
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-25220000
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	11819000
	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	-739000
	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	31000
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	350579000
	us-gaap	Reorganization Items ReorganizationItems	39794000
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold
	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	1055807000
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims	1055807000
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	185578000
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.30
	us-gaap	Dilutive Securities DilutiveSecurities	0
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	134312000
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2924000
	us-gaap	Increase Decrease In Cash Collateral For Borrowed Securities IncreaseDecreaseInCashCollateralForBorrowedSecurities	2440000
	us-gaap	Net Income Loss NetIncomeLoss	-997218000
	us-gaap	Net Investment Income NetInvestmentIncome	262806000
	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	-50943000
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.30
	us-gaap	Ceded Premiums Written Financial Guarantee Insurance Contracts CededPremiumsWrittenFinancialGuaranteeInsuranceContracts	18742000
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-4058000
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	302429879000	shares
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-216984000
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	8340000
	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	25724000
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-810774000
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	513169000
	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	-260366000
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	79454000
	us-gaap	Interest Expense Debt InterestExpenseDebt	95004000
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	-30178000
	us-gaap	Revenues Revenues	377195000
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1510000
	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	293125000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	77903000
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	37156000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	156385000
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-132000
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	6513000
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-20607000
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	45000
	us-gaap	Revenue From Administrative Services Other RevenueFromAdministrativeServicesOther	377195000
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	5006000
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13870000
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	955873000
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-5400000
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-810856000
	abk	Income Loss On Variable Interest Entities IncomeLossOnVariableInterestEntities	51236000
	abk	Amount Received Under Derivatives With Sponsored Special Purpose Entities AmountReceivedUnderDerivativesWithSponsoredSpecialPurposeEntities	3905000
	abk	Debtor Reorganization Items Office Lease Settlement DebtorReorganizationItemsOfficeLeaseSettlement	14007000
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	5006000
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	3055000
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	75998000
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	3119000
	us-gaap	Premiums Written Net Financial Guarantee Insurance Contracts PremiumsWrittenNetFinancialGuaranteeInsuranceContracts	106970000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	198898000
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-27364000
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	4844000
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1256671000
	abk	Payments From Drawdowns Of Borrowings Under Guaranteed Investment Agreements PaymentsFromDrawdownsOfBorrowingsUnderGuaranteedInvestmentAgreements	214574000
	abk	Proceeds From Issuance Of Borrowings Under Guaranteed Investment Agreements ProceedsFromIssuanceOfBorrowingsUnderGuaranteedInvestmentAgreements	30000
	abk	Premiums Written Gross PremiumsWrittenGross	125712000
	abk	Other Than Temporary Impairment Losses OtherThanTemporaryImpairmentLosses	39177000
	abk	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	5006000
	abk	Net Other Than Temporary Impairment Losses Recognized In Earnings NetOtherThanTemporaryImpairmentLossesRecognizedInEarnings	-30178000
	abk	Stock Based Compensation StockBasedCompensation	52613000
	abk	Income Loss From Continuing Operations Before Reorganization Items And Income Taxes IncomeLossFromContinuingOperationsBeforeReorganizationItemsAndIncomeTaxes	-879476000
	abk	Realized Gains Losses And Other Settlements RealizedGainsLossesAndOtherSettlements	13376000
	abk	Unrealized Gains Losses UnrealizedGainsLosses	6513000
	abk	Portion Of Loss Recognized In Other Comprehensive Income PortionOfLossRecognizedInOtherComprehensiveIncome	-8999000
	abk	Interest Paid On Investment Agreements InterestPaidOnInvestmentAgreements	7631000
	abk	Increase Decrease Variable Interest Entity Activities IncreaseDecreaseVariableInterestEntityActivities	51236000
	abk	Debtor Reorganization Items Other DebtorReorganizationItemsOther	32000
	abk	Direct And Assumed Premiums Written Financial Guarantee Insurance Contracts DirectAndAssumedPremiumsWrittenFinancialGuaranteeInsuranceContracts	125712000
	abk	Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held FairValueAssetOrLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainsLossesStillHeld	425901000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Additions Of Consolidated Vies FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityAdditionsOfConsolidatedVies	350624000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Deconsolidation Of Vies FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityDeconsolidationOfVies	1894967000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings	418732000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss	42465000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySales	16600000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements	323281000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree	-448913000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersOutOfLevelThree	-321182000
	abk	Insurance Premium Earned Related To Sponsored Special Purpose Entities InsurancePremiumEarnedRelatedToSponsoredSpecialPurposeEntities	607000
	abk	Net Change In Fair Value Of Credit Derivatives NetChangeInFairValueOfCreditDerivatives	19889000
	abk	Professional Fees Paid Relating To Chapter Eleven Proceeding ProfessionalFeesPaidRelatingToChapterElevenProceeding	18406000
	abk	Profit Loss Before Tax From Unaffiliated Customer ProfitLossBeforeTaxFromUnaffiliatedCustomer	-919270000
	abk	Amounts Recovered On Previously Paid Claims Related To Sponsored Special Purpose Entities AmountsRecoveredOnPreviouslyPaidClaimsRelatedToSponsoredSpecialPurposeEntities	5589000
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
	dei	Document Type DocumentType	10-Q
	dei	Document Period End Date DocumentPeriodEndDate	2012-09-30
	dei	Entity Central Index Key EntityCentralIndexKey	0000874501
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Trading Symbol TradingSymbol	ABK
	dei	Entity Registrant Name EntityRegistrantName	Ambac Financial Group Inc
	dei	Amendment Flag AmendmentFlag	false
	dei	Entity Filer Category EntityFilerCategory	Smaller Reporting Company
	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	86037000
	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears	607593000
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-174947000
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-272649000
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	188446000
	us-gaap	Increase Decrease In Loss And Loss Adjustment Expense Reserve IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve	-123343000
	us-gaap	Profit Loss ProfitLoss	-402655000
	us-gaap	Litigation Settlement Gross LitigationSettlementGross	27100000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	816367000
	us-gaap	Income Taxes Paid IncomeTaxesPaid	376000
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	302468502000	shares
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	Segment
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-69604000
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear	11508000
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	103448000
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-440852000
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-39958000
	us-gaap	Other Income OtherIncome	100562000
	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Payments Received FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumPaymentsReceived	115336000
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-425000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-401899000
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-35000
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Instruments Classified In Shareholders Equity Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityGainLossIncludedInEarnings	-1758000
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	27354000
	us-gaap	Premiums Earned Net PremiumsEarnedNet	311066000
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	820000
	us-gaap	Contractual Interest Expense On Prepetition Liabilities Not Recognized In Statement Of Operations ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations	64868000
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	12803000
	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageRiskFreeDiscountRate	0.026	pure
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-17692000
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	74066000
	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
	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	39000
	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments	2697000
	us-gaap	Reorganization Items ReorganizationItems	4480000
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	24007000
	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	-198811000
	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	720346000
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims	720346000
	us-gaap	Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod	P13Y
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	434010000
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	64675000
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.32
	us-gaap	Fair Value Inputs Long Term Net Of Tax Operating Income Margin Percent FairValueInputsLongTermNetOfTaxOperatingIncomeMarginPercent	0.20	pure
	us-gaap	Dilutive Securities DilutiveSecurities	0
	us-gaap	Derivative Credit Risk Related Contingent Features Triggering Circumstances DerivativeCreditRiskRelatedContingentFeaturesTriggeringCircumstances	None of our outstanding credit derivative transactions
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	163860000
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2294000
	us-gaap	Net Income Loss NetIncomeLoss	-400254000
	us-gaap	Net Investment Income NetInvestmentIncome	290031000
	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1 FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1	P10Y5M
	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	37417000
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.32
	us-gaap	Other Tax Carryforward Expiration Dates OtherTaxCarryforwardExpirationDates	Expiring in 2028 and will fully expire in 2032
	abk	Stock Based Compensation StockBasedCompensation	664000
	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div> <p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">Below is the loss reserve roll-forward, net of subrogation recoverable and reinsurance for the nine months ended September 30, 2012 and the year ended December 31, 2011:</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"> <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>Nine months</b></font><br /> <font style="FONT-FAMILY: Times New Roman" size="1"><b>Ended  September 30,</b></font><br /> <font style="FONT-FAMILY: Times New Roman" size="1"><b>2012</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</b></font><br /> <font style="FONT-FAMILY: Times New Roman" size="1"><b>December 31,</b></font><br /> <font style="FONT-FAMILY: Times New Roman" size="1"><b>2011</b></font></td> <td valign="bottom"><font size="1"> </font></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">Beginning balance of net loss 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">$</font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6,230,780</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">4,424,450</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: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Changes in the loss 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 reserves, gross of 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">239,294</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">503,697</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">Claim payments, 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">(11,508</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">(2,442</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 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">—  </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">(9,761</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">227,786</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">491,494</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: 3em"><font style="FONT-FAMILY: Times New Roman" size="2">Prior 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 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 reserves, gross of 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">487,037</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">1,683,831</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">Claim payments, 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">(607,593</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">(179,440</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 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">15,861</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">(324,151</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 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">(104,695</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">1,180,240</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: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Changes in loss 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">123,091</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">1,671,734</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: 1em"><font style="FONT-FAMILY: Times New Roman" size="2">Net deconsolidation of certain VIEs</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">—  </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">134,596</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">Ending loss 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">$</font></td> <td valign="bottom" align="right"><font style="FONT-FAMILY: Times New Roman" size="2">6,353,871</font></td> <td valign="bottom" nowrap="nowrap"><font style="FONT-FAMILY: Times New Roman" size="2">  </font></td> <td valign="bottom"><font size="1"> </font></td> <td valign="bottom"><font style="FONT-FAMILY: Times New Roman" size="2">$</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 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>
	us-gaap	Ceded Premiums Written Financial Guarantee Insurance Contracts CededPremiumsWrittenFinancialGuaranteeInsuranceContracts	18055000
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-8146000
	us-gaap	Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Amount CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAmount	123091000
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	302468502000	shares
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-336701000
	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P3Y6M
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	71997000
	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	4441000
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-335544000
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	930677000
	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	-113141000
	us-gaap	Loss Contingency Settlement Agreement Date LossContingencySettlementAgreementDate	May 4, 2011
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	70549000
	us-gaap	Interest Expense Debt InterestExpenseDebt	88962000
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	-5753000
	us-gaap	Revenues Revenues	515337000
	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-413000
	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	311066000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	756000
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	664000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	124008000
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-8616000
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	3532000
	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-21466000
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-2401000
	us-gaap	Revenue From Administrative Services Other RevenueFromAdministrativeServicesOther	515337000
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	70621000
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	963000
	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAccretionOfDiscountOnPremiumReceivable	38801000
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	601228000
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	62729000
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-337980000
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	70621000
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	4933000
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	1670000
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-177745000
	us-gaap	Premiums Written Net Financial Guarantee Insurance Contracts PremiumsWrittenNetFinancialGuaranteeInsuranceContracts	157722000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-405600000
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	55116000
	us-gaap	Loss Contingency Damages Sought Value LossContingencyDamagesSoughtValue	4524000
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	912756000
	abk	Payments From Drawdowns Of Borrowings Under Guaranteed Investment Agreements PaymentsFromDrawdownsOfBorrowingsUnderGuaranteedInvestmentAgreements	133123000
	abk	Premiums Written Gross PremiumsWrittenGross	175777000
	abk	Other Than Temporary Impairment Losses OtherThanTemporaryImpairmentLosses	14304000
	abk	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	70621000
	abk	Realized Gains Losses And Other Settlements RealizedGainsLossesAndOtherSettlements	9271000
	abk	Unrealized Gains Losses UnrealizedGainsLosses	3532000
	abk	Portion Of Loss Recognized In Other Comprehensive Income PortionOfLossRecognizedInOtherComprehensiveIncome	-8551000
	abk	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	15132000
	abk	Interest Paid On Investment Agreements InterestPaidOnInvestmentAgreements	6362000
	abk	Net Other Than Temporary Impairment Losses Recognized In Earnings NetOtherThanTemporaryImpairmentLossesRecognizedInEarnings	-5753000
	abk	Income Loss From Continuing Operations Before Reorganization Items And Income Taxes IncomeLossFromContinuingOperationsBeforeReorganizationItemsAndIncomeTaxes	-397419000
	abk	Weighted Average Amortization Period WeightedAverageAmortizationPeriod	P28Y
	abk	Increase Decrease Variable Interest Entity Activities IncreaseDecreaseVariableInterestEntityActivities	26893000
	abk	Income Loss On Variable Interest Entities IncomeLossOnVariableInterestEntities	26893000
	abk	Loss Contingency Damages Sought Amount LossContingencyDamagesSoughtAmount	800000000
	abk	Additional Adverse Sample Loans Reviewed Change In Subrogation AdditionalAdverseSampleLoansReviewedChangeInSubrogation
	abk	Additional Transactions Reviewed Change In Subrogation AdditionalTransactionsReviewedChangeInSubrogation
	abk	Adverse Loans Repurchased By Sponsor Change In Subrogation AdverseLoansRepurchasedBySponsorChangeInSubrogation	35000
	abk	Amount Received Under Derivatives With Sponsored Special Purpose Entities AmountReceivedUnderDerivativesWithSponsoredSpecialPurposeEntities	3387000
	abk	Available For Sale Securities Continuous Unrealized Loss Position Period Twelve Months Or Longer Aggregate Losses By Issuance By Large Diversified Financial Services AvailableForSaleSecuritiesContinuousUnrealizedLossPositionPeriodTwelveMonthsOrLongerAggregateLossesByIssuanceByLargeDiversifiedFinancialServices	P63M
	abk	Cash Payment To Settle Tax Years CashPaymentToSettleTaxYears	2000000
	abk	Derivatives Credit Risk Valuation Adjustment Derivative Liabilities Other Than Credit Derivatives DerivativesCreditRiskValuationAdjustmentDerivativeLiabilitiesOtherThanCreditDerivatives	155262000
	abk	Direct And Assumed Premiums Written Financial Guarantee Insurance Contracts DirectAndAssumedPremiumsWrittenFinancialGuaranteeInsuranceContracts	175777000
	abk	Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held FairValueAssetOrLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainsLossesStillHeld	409121000
	abk	Fair Value Measurement Process Description For Credit Derivatives Hypothetical Incremental Fee FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFee	0.0005	pure
	abk	Fair Value Measurement Process Description For Credit Derivatives Hypothetical Incremental Fee With Credit Deterioration FairValueMeasurementProcessDescriptionForCreditDerivativesHypotheticalIncrementalFeeWithCreditDeterioration	0.0015	pure
	abk	Fair Value Measurement Process Description For Credit Derivatives Remaining Life FairValueMeasurementProcessDescriptionForCreditDerivativesRemainingLife	P8Y
	abk	Fair Value Measurement Process Description For Credit Derivatives Revised Relative Change Ratio FairValueMeasurementProcessDescriptionForCreditDerivativesRevisedRelativeChangeRatio	0.732	pure
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings	527590000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss	558465000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements	508182000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree	-1494714000
	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersOutOfLevelThree	-650758000
	abk	Forfeiture Amount Over Payment ForfeitureAmountOverPayment	1234000
	abk	Insurance Premium Earned Related To Sponsored Special Purpose Entities InsurancePremiumEarnedRelatedToSponsoredSpecialPurposeEntities	342000
	abk	Interest Paid On Variable Interest Entity Secured Borrowing InterestPaidOnVariableInterestEntitySecuredBorrowing	1261000
	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Established Of Subrogation Recoveries Prior Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInEstablishedOfSubrogationRecoveriesPriorYear	-15861000
	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Loss Reserves Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesCurrentYear	227786000
	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Loss Reserves Prior Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesPriorYear	-104695000
	abk	Liability For Unpaid Claims And Claims Adjustment Expense Establishment Of New Loss Reserves Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseEstablishmentOfNewLossReservesCurrentYear	239294000
	abk	Maximum Unsecured Claims MaximumUnsecuredClaims	50000000
	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Previously Established Loss Reserves Prior Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInPreviouslyEstablishedLossReservesPriorYear	487037000
	abk	Profit Loss Before Tax From Unaffiliated Customer ProfitLossBeforeTaxFromUnaffiliatedCustomer	-401899000
	abk	Net Change In Fair Value Of Credit Derivatives NetChangeInFairValueOfCreditDerivatives	12803000
	abk	Net Par Exposure For Policies Allocated To Segregated Account NetParExposureForPoliciesAllocatedToSegregatedAccount	30450626000
	abk	Number Of Transaction Removed From Adverse Sample Subrogation Population NumberOfTransactionRemovedFromAdverseSampleSubrogationPopulation	2	Transactions
	abk	Operating Tax Carryforward Expiration Year End OperatingTaxCarryforwardExpirationYearEnd	2032
	abk	Operating Tax Carryforward Expiration Year Start OperatingTaxCarryforwardExpirationYearStart	2028
	abk	Other Changes Subrogation OtherChangesSubrogation	-31434000
	abk	Payment As Percentage Of Permitted Policy Claim PaymentAsPercentageOfPermittedPolicyClaim	0.25	pure
	abk	Percentage Of Credit Derivative Gross Par Outstanding Using Internally Estimated Reference Obligation Prices In Determination Of Fair Value PercentageOfCreditDerivativeGrossParOutstandingUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue	0.17	pure
	abk	Percentage Of Credit Derivative Liability Using Internally Estimated Reference Obligation Prices In Determination Of Fair Value PercentageOfCreditDerivativeLiabilityUsingInternallyEstimatedReferenceObligationPricesInDeterminationOfFairValue	0.19	pure
	abk	Percentage Of Credit Derivatives Gross Par Outstanding Using Third Party Reference Obligation Quotes In Determination Of Fair Value PercentageOfCreditDerivativesGrossParOutstandingUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue	0.83	pure
	abk	Percentage Of Credit Derivatives Liability Using Third Party Reference Obligation Quotes In Determination Of Fair Value PercentageOfCreditDerivativesLiabilityUsingThirdPartyReferenceObligationQuotesInDeterminationOfFairValue	0.81	pure
	abk	Percentage Of Future Claim Payments In Cash PercentageOfFutureClaimPaymentsInCash	0.25	pure
	abk	Percentage Of Future Claim Payments In Surplus Notes PercentageOfFutureClaimPaymentsInSurplusNotes	0.75	pure
	abk	Percentage Of Payment Under Tier C PercentageOfPaymentUnderTierC	0.125	pure
	abk	Percentage Of Payment Under Tier D PercentageOfPaymentUnderTierD	0.175	pure
	abk	Percentage Of Premiums Receivable Related To Non Investment Grade Rmbs Transactions PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeRmbsTransactions	0.09	pure
	abk	Percentage Of Premiums Receivable Related To Student Loan Transactions PercentageOfPremiumsReceivableRelatedToStudentLoanTransactions	0.11	pure
	abk	Percentage Premiums Receivable Related To Transactions With Non Investment Grade Internal Ratings PercentagePremiumsReceivableRelatedToTransactionsWithNonInvestmentGradeInternalRatings	0.43	pure
	abk	Premiums Uncollectible And Written Off Related To Non Investment Grade Obligation PremiumsUncollectibleAndWrittenOffRelatedToNonInvestmentGradeObligation	106714000
	abk	Professional Fees Paid Relating To Chapter Eleven Proceeding ProfessionalFeesPaidRelatingToChapterElevenProceeding	7662000
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.25
CY2011	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Payments Received FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumPaymentsReceived	190823000
CY2011	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1 FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1	P10Y
CY2011	us-gaap	Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Amount CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAmount	1671734000
CY2011	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P4Y1M6D
CY2011	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAccretionOfDiscountOnPremiumReceivable	62841000
CY2011Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-662951000
CY2011Q3	us-gaap	Profit Loss ProfitLoss	-75509000
CY2011Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	302467255000	shares
CY2011Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	44860000
CY2010	abk	Payment Of Consideration Under Settlement Agreement Principal Amount PaymentOfConsiderationUnderSettlementAgreementPrincipalAmount	2000000000
CY2010	abk	Accrued Interest Rate Percentage AccruedInterestRatePercentage	0.045	pure
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears	179440000
CY2011	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear	2442000
CY2011	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	-240547000
CY2011Q3	us-gaap	Other Income OtherIncome	-4972000
CY2011Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-2264000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-498000
	abk	Weighted Average Rating Of Assets Held By Sponsored Special Purpose Entities WeightedAverageRatingOfAssetsHeldBySponsoredSpecialPurposeEntities	no longer than 90 days
	abk	Insurance Liabilities Not Assumed By Entity Assurance InsuranceLiabilitiesNotAssumedByEntityAssurance	296018000
	abk	Amounts Recovered On Previously Paid Claims Related To Sponsored Special Purpose Entities AmountsRecoveredOnPreviouslyPaidClaimsRelatedToSponsoredSpecialPurposeEntities	14691000
CY2011Q2	abk	Potential Reduction In Net Operating Loss PotentialReductionInNetOperatingLoss	807244000
CY2010	abk	Debt Instrument Maturity Year DebtInstrumentMaturityYear	2050
CY2011	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageRiskFreeDiscountRate	0.026	pure
CY2011	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments	-8830000
CY2011	us-gaap	Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod	P13Y
CY2011	abk	Derivatives Credit Risk Valuation Adjustment Derivative Liabilities Other Than Credit Derivatives DerivativesCreditRiskValuationAdjustmentDerivativeLiabilitiesOtherThanCreditDerivatives	166868000
CY2011	abk	Financial Guarantee Insurance Contracts Premium Receivable Consolidation Of Certain Variable Interest Entity FinancialGuaranteeInsuranceContractsPremiumReceivableConsolidationOfCertainVariableInterestEntity	104736000
CY2011	abk	Financial Guarantee Insurance Contracts Premium Receivable Deconsolidation Of Certain Variable Interest Entity FinancialGuaranteeInsuranceContractsPremiumReceivableDeconsolidationOfCertainVariableInterestEntity	87978000
CY2011	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Deconsolidation LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInDeconsolidation	134596000
CY2011	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Established Of Subrogation Recoveries Prior Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInEstablishedOfSubrogationRecoveriesPriorYear	324151000
CY2011	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Loss Reserves Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesCurrentYear	491494000
CY2011	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Loss Reserves Prior Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInLossReservesPriorYear	1180240000
CY2011	abk	Liability For Unpaid Claims And Claims Adjustment Expense Change In Previously Established Loss Reserves Prior Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseChangeInPreviouslyEstablishedLossReservesPriorYear	1683831000
CY2011	abk	Liability For Unpaid Claims And Claims Adjustment Expense Establishment Of New Loss Reserves Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseEstablishmentOfNewLossReservesCurrentYear	503697000
CY2011	abk	Liability For Unpaid Claims And Claims Adjustment Expense Establishment Of Subrogation Recoveries Current Year LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseEstablishmentOfSubrogationRecoveriesCurrentYear	9761000
CY2011	abk	Percentage Of Premiums Receivable Related To Non Investment Grade Rmbs Transactions PercentageOfPremiumsReceivableRelatedToNonInvestmentGradeRmbsTransactions	0.12	pure
CY2011	abk	Percentage Of Premiums Receivable Related To Student Loan Transactions PercentageOfPremiumsReceivableRelatedToStudentLoanTransactions	0.11	pure
CY2011	abk	Percentage Premiums Receivable Related To Transactions With Non Investment Grade Internal Ratings PercentagePremiumsReceivableRelatedToTransactionsWithNonInvestmentGradeInternalRatings	0.43	pure
CY2011	abk	Premiums Uncollectible And Written Off Related To Non Investment Grade Obligation PremiumsUncollectibleAndWrittenOffRelatedToNonInvestmentGradeObligation	90930000
CY2011Q3	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	18835000
CY2011Q3	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0
CY2011Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	58309000
CY2011Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-4000
CY2011Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Instruments Classified In Shareholders Equity Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityGainLossIncludedInEarnings	-1119000
CY2011Q3	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	-60238000
CY2011Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims	-60238000
CY2011Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-31086000
CY2011Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	1892000
CY2011Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	102055000
CY2011Q3	us-gaap	Contractual Interest Expense On Prepetition Liabilities Not Recognized In Statement Of Operations ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations	26878000
CY2011Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	4505000
CY2011Q3	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	-14000
CY2011Q3	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	13000
CY2011Q3	us-gaap	Reorganization Items ReorganizationItems	8519000
CY2011Q3	us-gaap	Dilutive Securities DilutiveSecurities	0
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	-75507000
CY2011Q3	us-gaap	Net Investment Income NetInvestmentIncome	90699000
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.25
CY2011Q3	us-gaap	Ceded Premiums Written Financial Guarantee Insurance Contracts CededPremiumsWrittenFinancialGuaranteeInsuranceContracts	-2047000
CY2011Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	302467255000	shares
CY2011Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	4085000
CY2011Q3	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	8506000
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-106589000
CY2011Q3	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	-215775000
CY2011Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	33074000
CY2011Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	-10887000
CY2011Q3	us-gaap	Revenues Revenues	25717000
CY2011Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1494000
CY2011Q3	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	102055000
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	75011000
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-36121000
CY2011Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-2000
CY2011Q3	us-gaap	Revenue From Administrative Services Other RevenueFromAdministrativeServicesOther	25717000
CY2011Q3	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	5084000
CY2011Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5708000
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-106595000
CY2011Q3	us-gaap	Premiums Written Net Financial Guarantee Insurance Contracts PremiumsWrittenNetFinancialGuaranteeInsuranceContracts	-240526000
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0
CY2011Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-7285000
CY2011Q3	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	495000
CY2011Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	17696000
CY2011Q3	abk	Premiums Written Gross PremiumsWrittenGross	-242573000
CY2011Q3	abk	Other Than Temporary Impairment Losses OtherThanTemporaryImpairmentLosses	19671000
CY2011Q3	abk	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	5084000
CY2011Q3	abk	Net Other Than Temporary Impairment Losses Recognized In Earnings NetOtherThanTemporaryImpairmentLossesRecognizedInEarnings	-10887000
CY2011Q3	abk	Income Loss From Continuing Operations Before Reorganization Items And Income Taxes IncomeLossFromContinuingOperationsBeforeReorganizationItemsAndIncomeTaxes	8021000
CY2011Q3	abk	Realized Gains Losses And Other Settlements RealizedGainsLossesAndOtherSettlements	3829000
CY2011Q3	abk	Unrealized Gains Losses UnrealizedGainsLosses	676000
CY2011Q3	abk	Portion Of Loss Recognized In Other Comprehensive Income PortionOfLossRecognizedInOtherComprehensiveIncome	-8784000
CY2011Q3	abk	Income Loss On Variable Interest Entities IncomeLossOnVariableInterestEntities	55008000
CY2011Q3	abk	Amount Received Under Derivatives With Sponsored Special Purpose Entities AmountReceivedUnderDerivativesWithSponsoredSpecialPurposeEntities	170000
CY2011Q3	abk	Direct And Assumed Premiums Written Financial Guarantee Insurance Contracts DirectAndAssumedPremiumsWrittenFinancialGuaranteeInsuranceContracts	-242573000
CY2011Q3	abk	Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held FairValueAssetOrLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainsLossesStillHeld	162300000
CY2011Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings	139373000
CY2011Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss	-407837000
CY2011Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues
CY2011Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements	52002000
CY2011Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree	-192773000
CY2011Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Out Of Level Three FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersOutOfLevelThree	-40754000
CY2011Q3	abk	Insurance Premium Earned Related To Sponsored Special Purpose Entities InsurancePremiumEarnedRelatedToSponsoredSpecialPurposeEntities	180000
CY2011Q3	abk	Net Change In Fair Value Of Credit Derivatives NetChangeInFairValueOfCreditDerivatives	4505000
CY2011Q3	abk	Profit Loss Before Tax From Unaffiliated Customer ProfitLossBeforeTaxFromUnaffiliatedCustomer	-498000
CY2011Q3	abk	Amounts Recovered On Previously Paid Claims Related To Sponsored Special Purpose Entities AmountsRecoveredOnPreviouslyPaidClaimsRelatedToSponsoredSpecialPurposeEntities	5417000
CY2012Q3	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	34381000
CY2012Q3	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0
CY2012Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-5709000
CY2012Q3	us-gaap	Profit Loss ProfitLoss	157373000
CY2012Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	302469966000	shares
CY2012Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	33347000
CY2012Q3	us-gaap	Other Income OtherIncome	-368000
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1686000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	158040000
CY2012Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	117000
CY2012Q3	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Instruments Classified In Shareholders Equity Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityGainLossIncludedInEarnings	-771000
CY2012Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	5502000
CY2012Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	113074000
CY2012Q3	us-gaap	Contractual Interest Expense On Prepetition Liabilities Not Recognized In Statement Of Operations ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations	20428000
CY2012Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	27440000
CY2012Q3	us-gaap	Debtor Reorganization Items Other Expense Income DebtorReorganizationItemsOtherExpenseIncome	13000
CY2012Q3	us-gaap	Reorganization Items ReorganizationItems	1252000
CY2012Q3	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	-18745000
CY2012Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims	-18745000
CY2012Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	110493000
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2012Q3	us-gaap	Dilutive Securities DilutiveSecurities	0
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	157544000
CY2012Q3	us-gaap	Net Investment Income NetInvestmentIncome	84078000
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2012Q3	us-gaap	Ceded Premiums Written Financial Guarantee Insurance Contracts CededPremiumsWrittenFinancialGuaranteeInsuranceContracts	2082000
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	302582276000	shares
CY2012Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	3492000
CY2012Q3	us-gaap	Debtor Reorganization Items Legal And Advisory Professional Fees DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees	1239000
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	267920000
CY2012Q3	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	-36007000
CY2012Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	23268000
CY2012Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	-354000
CY2012Q3	us-gaap	Revenues Revenues	197162000
CY2012Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-258000
CY2012Q3	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	113074000
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	667000
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	108446000
CY2012Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-171000
CY2012Q3	us-gaap	Revenue From Administrative Services Other RevenueFromAdministrativeServicesOther	197162000
CY2012Q3	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	3162000
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	267866000
CY2012Q3	us-gaap	Premiums Written Net Financial Guarantee Insurance Contracts PremiumsWrittenNetFinancialGuaranteeInsuranceContracts	53228000
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-361000
CY2012Q3	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	72000
CY2012Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	37870000
CY2012Q3	abk	Premiums Written Gross PremiumsWrittenGross	55310000
CY2012Q3	abk	Other Than Temporary Impairment Losses OtherThanTemporaryImpairmentLosses	2501000
CY2012Q3	abk	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	3162000
CY2012Q3	abk	Net Other Than Temporary Impairment Losses Recognized In Earnings NetOtherThanTemporaryImpairmentLossesRecognizedInEarnings	-354000
CY2012Q3	abk	Income Loss From Continuing Operations Before Reorganization Items And Income Taxes IncomeLossFromContinuingOperationsBeforeReorganizationItemsAndIncomeTaxes	159292000
CY2012Q3	abk	Realized Gains Losses And Other Settlements RealizedGainsLossesAndOtherSettlements	2944000
CY2012Q3	abk	Unrealized Gains Losses UnrealizedGainsLosses	24496000
CY2012Q3	abk	Portion Of Loss Recognized In Other Comprehensive Income PortionOfLossRecognizedInOtherComprehensiveIncome	-2147000
CY2012Q3	abk	Income Loss On Variable Interest Entities IncomeLossOnVariableInterestEntities	6137000
CY2012Q3	abk	Amount Received Under Derivatives With Sponsored Special Purpose Entities AmountReceivedUnderDerivativesWithSponsoredSpecialPurposeEntities	360000
CY2012Q3	abk	Direct And Assumed Premiums Written Financial Guarantee Insurance Contracts DirectAndAssumedPremiumsWrittenFinancialGuaranteeInsuranceContracts	55310000
CY2012Q3	abk	Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held FairValueAssetOrLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainsLossesStillHeld	363599000
CY2012Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInEarnings	367070000
CY2012Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityGainLossIncludedInOtherComprehensiveIncomeLoss	386830000
CY2012Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityIssues
CY2012Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilitySettlements	50728000
CY2012Q3	abk	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Transfers Into Level Three FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOrLiabilityTransfersIntoLevelThree	-576272000
CY2012Q3	abk	Insurance Premium Earned Related To Sponsored Special Purpose Entities InsurancePremiumEarnedRelatedToSponsoredSpecialPurposeEntities	87000
CY2012Q3	abk	Net Change In Fair Value Of Credit Derivatives NetChangeInFairValueOfCreditDerivatives	27440000
CY2012Q3	abk	Profit Loss Before Tax From Unaffiliated Customer ProfitLossBeforeTaxFromUnaffiliatedCustomer	158040000
CY2012Q3	abk	Amounts Recovered On Previously Paid Claims Related To Sponsored Special Purpose Entities AmountsRecoveredOnPreviouslyPaidClaimsRelatedToSponsoredSpecialPurposeEntities	4846000

Files In Submission

Name	View Source	Status
0001193125-12-470880-index-headers.html	Edgar Link	pending
0001193125-12-470880-index.html	Edgar Link	pending
0001193125-12-470880.txt	Edgar Link	pending
0001193125-12-470880-xbrl.zip	Edgar Link	pending
abk-20120930.xml	Edgar Link	completed
abk-20120930.xsd	Edgar Link	pending
abk-20120930_cal.xml	Edgar Link	unprocessable
abk-20120930_def.xml	Edgar Link	unprocessable
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$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc

2012 Q4 Form 10-Q Financial Statement

#000119312512470880 Filed on November 14, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC AMBAC FINANCIAL GROUP INC Stock $ambc

2012 Q4 Form 10-Q Financial Statement

#000119312512470880 Filed on November 14, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc