XML 87 R71.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Derivative Instruments - Summary of Location and Amount of Gains and Losses of Derivative Contracts (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ 0 | $ 0 | $ 2,000 | $ (3,000)
Derivative, Gain (Loss) on Derivatives, Total Net | 44,000 | 97,000 | 61,000 | (8,000)
Net gains (losses) on derivative contracts [Domain] | Interest Rate Swap [Member] |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 1,000 | 1,000 | 2,000 | (3,000)
Net gains (losses) on derivative contracts [Domain] | Warrants [Member] |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0 | 0
Net gains (losses) on derivative contracts [Domain] | Foreign Exchange Future |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 |  | 0 |
Income Loss On Variable Interest Entities [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 44,000 | 96,000 | 59,000 | (5,000)
Income Loss On Variable Interest Entities [Member] | Interest Rate Swap [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 43,000 | 97,000 | 57,000 | (2,000)
Income Loss On Variable Interest Entities [Member] | Currency Swaps [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ 0 | $ (1,000) | $ 2,000 | $ (3,000)

X
- Definition Derivative, Gain (Loss) on Derivatives, Total Net + References No definition available. + Details
Name: | ambc_DerivativeGainLossonDerivativesTotalNet
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=ambc_NetgainslossesonderivativecontractsDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeFutureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=ambc_IncomeLossOnVariableInterestEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CurrencySwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |