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Income Taxes - NOL Usage Table (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013
Net Income Loss Reconciliation [Line Items] |
NOL allocated, Amount | $ 6,220,353
Tier A [Member] |
Net Income Loss Reconciliation [Line Items] |
NOL allocated, Amount | 479,000,000
NOL, Applicable percentage | 15.00%
Tier B [Member] |
Net Income Loss Reconciliation [Line Items] |
NOL allocated, Amount | 1,057,000,000
NOL, Applicable percentage | 40.00%
Tier C [Member] |
Net Income Loss Reconciliation [Line Items] |
NOL allocated, Amount | 1,057,000,000
NOL, Applicable percentage | 10.00%
Tier D [Member] |
Net Income Loss Reconciliation [Line Items] |
NOL allocated, Amount | $ 1,057,000,000
NOL, Applicable percentage | 15.00%

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- Details
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- Definition Net Operating Loss Percentage + References No definition available. + Details
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Namespace Prefix: | ambc_
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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