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v2.4.1.9

Income Taxes Income Taxes - Effect of Income Taxes on Net Income and Stockholders' Equity (Details) (USD $) In Thousands, unless otherwise specified | 8 Months Ended | 12 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2014 | Apr. 30, 2013 | Dec. 31, 2012
Successor [Member] |  |  |  |
Income Tax Expense (Benefit) [Roll Forward] |  |  |  |
Income tax expense (benefit) | $ 7,514 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember | $ 9,557 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember |  |
Net Unrealized Losses On Securities Tax Effect | 284 ambc_NetUnrealizedLossesOnSecuritiesTaxEffect / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember | 73,306 ambc_NetUnrealizedLossesOnSecuritiesTaxEffect / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember |  |
Valuation Allowances And Reserves Charged To Equity | (284)ambc_ValuationAllowancesAndReservesChargedToEquity / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember | (73,306)ambc_ValuationAllowancesAndReservesChargedToEquity / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember |  |
Income Tax Effects Allocated Directly to Equity | 0 us-gaap_IncomeTaxEffectsAllocatedDirectlyToEquity / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember | 0 us-gaap_IncomeTaxEffectsAllocatedDirectlyToEquity / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember |  |
Income tax expense (benefit) | 7,514 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember | 9,557 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_SuccessorMember |  |
Predecessor [Member] |  |  |  |
Income Tax Expense (Benefit) [Roll Forward] |  |  |  |
Income tax expense (benefit) |  |  | 755 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 2,849 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Net Unrealized Losses On Securities Tax Effect |  |  | (204,145)ambc_NetUnrealizedLossesOnSecuritiesTaxEffect / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 18,448 ambc_NetUnrealizedLossesOnSecuritiesTaxEffect / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Valuation Allowances And Reserves Charged To Equity |  |  | 204,145 ambc_ValuationAllowancesAndReservesChargedToEquity / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (18,448)ambc_ValuationAllowancesAndReservesChargedToEquity / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Income Tax Effects Allocated Directly to Equity |  |  | 0 us-gaap_IncomeTaxEffectsAllocatedDirectlyToEquity / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 0 us-gaap_IncomeTaxEffectsAllocatedDirectlyToEquity / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Income tax expense (benefit) |  |  | $ 755 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | $ 2,849 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember

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- Definition The sum of the tax effects of all items occurring during the period that have been charged or credited directly to other comprehensive income or to related components of shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e39076-109324 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (d),(e) -URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e38679-109324 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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