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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Common stock, par value | $ 0.01 |
Common stock, shares issued | 45,000,000 |
Successor Ambac [Member] |  |
Fixed income securities, amortized cost | $ 5,927,254 |
Fixed income securities pledged as collateral, amortized cost | 126,196 |
Short-term investments, amortized cost | 271,118 |
Preferred stock, par value | $ 0.01 |
Preferred stock, shares authorized | 20,000,000 |
Preferred stock, shares issued | 0 |
Preferred stock, shares outstanding | 0 |
Common stock, par value | $ 0.01 |
Common stock, shares authorized | 130,000,000 |
Common stock, shares issued | 45,003,461 |
Common stock, shares outstanding | 45,003,461 |
Treasure stock, shares | 937 | 0
Successor Ambac [Member] | Variable Interest Entity [Member] |  |
Loans, fair value | 13,398,895 |
Long-term debt, fair value | 14,091,753 |
Predecessor Ambac [Member] |  |
Fixed income securities, amortized cost |  | 4,751,824
Fixed income securities pledged as collateral, amortized cost |  | 265,517
Short-term investments, amortized cost |  | 661,219
Preferred stock, par value |  | $ 0.01
Preferred stock, shares authorized |  | 4,000,000
Preferred stock, shares issued |  | 0
Preferred stock, shares outstanding |  | 0
Common stock, par value |  | $ 0.01
Common stock, shares authorized |  | 650,000,000
Common stock, shares issued |  | 308,016,674
Common stock, shares outstanding |  | 308,016,674
Treasure stock, shares |  | 5,580,657
Predecessor Ambac [Member] | Variable Interest Entity [Member] |  |
Loans, fair value |  | 15,359,073
Long-term debt, fair value |  | $ 15,200,538

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- Definition This item represents the amortized cost of other short term investments not otherwise specified in the taxonomy that will be realized in a short period of time, usually less than one year, net of adjustments made for accretion, amortization, other-than-temporary impairments. + References No definition available. + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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