XML 83 R72.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Derivative Instruments - Summary of Gross Principal Notional Outstanding for CDS Contracts (Detail) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Ambac Rating |  |
Notional outstanding | $ 861,511 | $ 970,883
Successor [Member] |  |
Ambac Rating |  |
Notional outstanding | 861,511 | 970,883
Other Derivatives [Member] | Successor [Member] |  |
Ambac Rating |  |
Notional outstanding | 861,511 | 970,883
Other Derivatives [Member] | Successor [Member] | AAA Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 0 | 0
Other Derivatives [Member] | Successor [Member] | AA Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 427,680 | 536,712
Other Derivatives [Member] | Successor [Member] | A Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 0 | 9,322
Other Derivatives [Member] | Successor [Member] | BBB Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 363,839 | 356,323
Other Derivatives [Member] | Successor [Member] | Below Investment Grade Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 69,992 | 68,526
CLO [Member] | Successor [Member] |  |
Ambac Rating |  |
Notional outstanding | 231,376 | 295,254
CLO [Member] | Other Derivatives [Member] | Successor [Member] |  |
Ambac Rating |  |
Notional outstanding | 231,376 | 295,254
CLO [Member] | Other Derivatives [Member] | Successor [Member] | AAA Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 0 | 0
CLO [Member] | Other Derivatives [Member] | Successor [Member] | AA Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 231,376 | 295,254
CLO [Member] | Other Derivatives [Member] | Successor [Member] | A Rating [Member] [Member] |  |
Ambac Rating |  |
Notional outstanding | 0 | 0
Other [Member] | Successor [Member] |  |
Ambac Rating |  |
Notional outstanding | 630,135 | 675,629
Other [Member] | Other Derivatives [Member] | Successor [Member] |  |
Ambac Rating |  |
Notional outstanding | 630,135 | 675,629
Other [Member] | Other Derivatives [Member] | Successor [Member] | AAA Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 0 | 0
Other [Member] | Other Derivatives [Member] | Successor [Member] | AA Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 196,304 | 241,458
Other [Member] | Other Derivatives [Member] | Successor [Member] | A Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 0 | 9,322
Other [Member] | Other Derivatives [Member] | Successor [Member] | BBB Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | 363,839 | 356,323
Other [Member] | Other Derivatives [Member] | Successor [Member] | Below Investment Grade Rating [Member] |  |
Ambac Rating |  |
Notional outstanding | $ 69,992 | $ 68,526

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_NotionalAmountOfDerivativesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_SuccessorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditDerivativesByContractTypeAxis=us-gaap_OtherCreditDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_CreditRatingSourceAxis=ambc_AaaRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_CreditRatingSourceAxis=ambc_AaRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_CreditRatingSourceAxis=ambc_RatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_CreditRatingSourceAxis=ambc_BbbRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_CreditRatingSourceAxis=ambc_BelowInvestmentGradeRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnderlyingAssetClassAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_CreditRatingSourceAxis=ambc_ARatingMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_UnderlyingAssetClassAxis=us-gaap_UnderlyingOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |