XML 13 R39.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Comprehensive Income - Schedule of Changes in Balances of Each Component of Accumulated Other Comprehensive Income (Detail) - Successor [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Changes In Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | $ 95,362 | $ 306,328 | $ 220,283 | $ 11,661
Other comprehensive income before reclassifications | (29,295) | (50,256) | (109,337) | 245,035
Amounts reclassified from accumulated other comprehensive income | 6,820 | (5,207) | (38,059) | (5,831)
Net current period other comprehensive income | (22,475) | (55,463) | (147,396) | 239,204
Ending Balance | 72,887 | 250,865 | 72,887 | 250,865
Unrealized Gains (Losses) on Available-for-Sale Securities [Member] |  |  |  |
Changes In Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | 79,406 | 231,975 | 210,693 | (41,910)
Other comprehensive income before reclassifications | 1,342 | (12,222) | (85,313) | 261,879
Amounts reclassified from accumulated other comprehensive income | 7,040 | (5,003) | (37,592) | (5,219)
Net current period other comprehensive income | 8,382 | (17,225) | (122,905) | 256,660
Ending Balance | 87,788 | 214,750 | 87,788 | 214,750
Other Postretirement Benefit Plan, Defined Benefit [Member] |  |  |  |
Changes In Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | 9,784 | 10,439 | 10,031 | 10,847
Other comprehensive income before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from accumulated other comprehensive income | (220) | (204) | (467) | (612)
Net current period other comprehensive income | (220) | (204) | (467) | (612)
Ending Balance | 9,564 | 10,235 | 9,564 | 10,235
Accumulated Translation Adjustment [Member] |  |  |  |
Changes In Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning Balance | 6,172 | 63,914 | (441) | 42,724
Other comprehensive income before reclassifications | (30,637) | (38,034) | (24,024) | (16,844)
Amounts reclassified from accumulated other comprehensive income | 0 | 0 | 0 | 0
Net current period other comprehensive income | (30,637) | (38,034) | (24,024) | (16,844)
Ending Balance | $ (24,465) | $ 25,880 | $ (24,465) | $ 25,880

X
- Definition Changes In Accumulated Other Comprehensive Income [Roll Forward] + References No definition available. + Details
Name: | ambc_ChangesInAccumulatedOtherComprehensiveIncomeRollForward
Namespace Prefix: | ambc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net of tax amount of other comprehensive income (loss) excluding noncontrolling interest. + References No definition available. + Details
Name: | ambc_OtherComprehensiveIncomeLossExcludingNoncontrollingInterestNetOfTax
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581 + Details
Name: | us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_StatementEquityComponentsAxis=us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedTranslationAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |