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Schedule II - Liabilities Subject to Compromise (Parenthetical) (Detail) (Predecessor Ambac [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013
Predecessor Ambac [Member] |
Condensed Financial Statements, Captions [Line Items] |
Litigation settlement amount | $ 14,007

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

X
- 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