XML 59 R44.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | Nov. 02, 2016 | Jun. 30, 2015 | May 01, 2013
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |
Warrants Repurchased Average Cost per Warrant | $ 8.21 |  |  |  |  |
RemainingWarrantBuyBackAuthorizedDollars | $ 11,939 |  |  |  |  |
Successor [Member] |  |  |  |  |  |
Schedule Of Earnings Per Share [Line Items] |  |  |  |  |  |
Common stock, shares outstanding | 45,332,214 |  |  |  |  |
Par value of common stock issued | $ 0.01 |  | $ 0.01 |  |  |
Exercise price of common stock |  |  |  |  |  | $ 16.67
Common stock shares issued | 194 | 0 |  |  |  |
First Warrant Buyback Authorization Dollars |  |  |  |  | $ 10,000 |
Warrant exercised | 194 | 0 |  |  |  |
Warrants outstanding | 4,053,476 |  |  |  |  |
SecondWarrantBuyBackAuthorizedDollars |  |  |  | $ 10,000 |  |
Warrants Purchased Shares | 985,331 |  |  |  |  |
Payments for Repurchase of Warrants | $ 8,092 |  |  |  |  |

X
- Definition First Warrant Buyback Authorization Dollars + References No definition available. + Details
Name: | ambc_FirstWarrantBuybackAuthorizationDollars
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition RemainingWarrantBuyBackAuthorizedDollars + References No definition available. + Details
Name: | ambc_RemainingWarrantBuyBackAuthorizedDollars
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Schedule Of Earnings Per Share [Line Items] + References No definition available. + Details
Name: | ambc_ScheduleOfEarningsPerShareLineItems
Namespace Prefix: | ambc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition SecondWarrantBuyBackAuthorizedDollars + References No definition available. + Details
Name: | ambc_SecondWarrantBuyBackAuthorizedDollars
Namespace Prefix: | ambc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Warrant Exercised During Period Shares + References No definition available. + Details
Name: | ambc_WarrantExercisedDuringPeriodShares
Namespace Prefix: | ambc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warrants Outstanding + References No definition available. + Details
Name: | ambc_WarrantsOutstanding
Namespace Prefix: | ambc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Warrants Purchased Shares + References No definition available. + Details
Name: | ambc_WarrantsPurchasedShares
Namespace Prefix: | ambc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warrants Repurchased Average Cost per Warrant + References No definition available. + Details
Name: | ambc_WarrantsRepurchasedAverageCostperWarrant
Namespace Prefix: | ambc_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + 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.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The aggregate amount paid by the entity to reacquire the right to purchase equity shares at a predetermined price, usually issued together with corporate debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsForRepurchaseOfWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_SuccessorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |