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Consolidated Statements of Stockholders' Equity (USD $) In Thousands | Successor Ambac [Member] | Predecessor Ambac [Member] | Retained Earnings/Accumulated Deficit [Member] Successor Ambac [Member] | Retained Earnings/Accumulated Deficit [Member] Predecessor Ambac [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Successor Ambac [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Predecessor Ambac [Member] | Preferred Stock [Member] Successor Ambac [Member] | Preferred Stock [Member] Predecessor Ambac [Member] | Common Stock [Member] Successor Ambac [Member] | Common Stock [Member] Predecessor Ambac [Member] | Paid-in Capital [Member] Successor Ambac [Member] | Paid-in Capital [Member] Predecessor Ambac [Member] | Common Stock Held in Treasury, at Cost [Member] Successor Ambac [Member] | Common Stock Held in Treasury, at Cost [Member] Predecessor Ambac [Member] | Noncontrolling Interest [Member] Successor Ambac [Member] | Noncontrolling Interest [Member] Predecessor Ambac [Member]
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Beginning balance at Dec. 31, 2011 |  | $ (3,149,533) |  | $ (6,039,922) |  | $ 463,259 |  |  |  | $ 3,080 |  | $ 2,172,027 |  | $ (411,419) |  | $ 663,442
Total comprehensive income (loss) |  | (97,434) |  | (256,678) |  | 162,126 |  |  |  |  |  |  |  |  |  | (2,882)
Stock-based compensation |  | (664) |  | (664) |  |  |  |  |  |  |  |  |  |  |  |
Shares issued under equity plans |  | 664 |  |  |  |  |  |  |  |  |  |  |  | 664 |  |
Ending balance at Dec. 31, 2012 |  | (3,246,967) |  | (6,297,264) |  | 625,385 |  |  |  | 3,080 |  | 2,172,027 |  | (410,755) |  | 660,560
Total comprehensive income (loss) |  | 3,522,382 |  | 3,349,049 |  | 174,875 |  |  |  |  |  |  |  |  |  | (1,542)
Stock-based compensation |  | (60) |  | (60) |  |  |  |  |  |  |  |  |  |  |  |
Shares issued under equity plans |  | 60 |  |  |  |  |  |  |  |  |  |  |  | 60 |  |
Elimination of Predecessor Ambac Shareholder equity accounts and noncontrolling interest adjustment |  |  |  | 2,948,275 |  | (800,260) |  |  |  | (3,080) |  | (2,172,027) |  | 410,695 |  | (383,603)
Ending balance at Apr. 30, 2013 | 460,415 | 275,415 |  |  |  |  |  |  | 450 |  | 184,550 |  |  |  | 275,415 | 275,415
Balance at May 1, 2013 | 275,415 |  |  |  |  |  |  |  |  |  |  |  |  |  | 275,415 |
Issuance of new equity in connection with emergence from Chapter 11 | 185,000 |  |  |  |  |  |  |  | 450 |  | 184,550 |  |  |  |  |
Total comprehensive income (loss) | 516,904 |  | 505,219 |  | 11,661 |  |  |  |  |  |  |  |  |  | 24 |
Warrants exercised | 16 |  |  |  |  |  |  |  |  |  | 16 |  |  |  |  |
Cost of shares acquired | (19) |  |  |  |  |  |  |  |  |  |  |  | (19) |  |  |
Stock-based compensation | 1,106 |  |  |  |  |  |  |  |  |  | 1,106 |  |  |  |  |
Ending balance at Dec. 31, 2013 | $ 978,422 |  | $ 505,219 |  | $ 11,661 |  |  |  | $ 450 |  | $ 185,672 |  | $ (19) |  | $ 275,439 |

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- Definition All amounts related to share-based compensation plans. Includes the value of stock issued during the period as a result of any share-based compensation plans and the amount of share-based compensation recognized in the statement of operations. + References No definition available. + Details
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