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Fresh Start Financial Statement Reporting - Schedule of Liabilities Subject to Compromise (Parenthetical) (Detail) (Predecessor Ambac [Member], USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2013
Predecessor Ambac [Member] |
Fresh-Start Adjustment [Line Items] |
Litigation settlement amount | $ 14,007

X
- Details
Name: | us-gaap_FreshStartAdjustmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of judgment or settlement awarded to (against) the entity in respect of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration