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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified | Total | Successor Ambac [Member] | Successor Ambac [Member] Accumulated Deficit [Member] | Successor Ambac [Member] Accumulated Other Comprehensive Income (Loss) [Member] | Successor Ambac [Member] Preferred Stock [Member] | Successor Ambac [Member] Common Stock [Member] | Successor Ambac [Member] Additional Paid-in Capital [Member] | Successor Ambac [Member] Treasury Stock [Member] | Successor Ambac [Member] Noncontrolling Interest [Member] | Predecessor Ambac [Member] | Predecessor Ambac [Member] Accumulated Deficit [Member] | Predecessor Ambac [Member] Accumulated Other Comprehensive Income (Loss) [Member] | Predecessor Ambac [Member] Preferred Stock [Member] | Predecessor Ambac [Member] Common Stock [Member] | Predecessor Ambac [Member] Additional Paid-in Capital [Member] | Predecessor Ambac [Member] Treasury Stock [Member] | Predecessor Ambac [Member] Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2012 |  |  |  |  |  |  |  |  |  | $ (3,246,967) | $ (6,297,264) | $ 625,385 | $ 0 | $ 3,080 | $ 2,172,027 | $ (410,755) | $ 660,560
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income (loss) |  |  |  |  |  |  |  |  |  | 376,897 | 282,299 | 94,686 | 0 | 0 | 0 | 0 | (88)
Stock-based compensation |  |  |  |  |  |  |  |  |  | (60) | (60) | 0 | 0 | 0 | 0 | 0 | 0
Shares issued under equity plans |  |  |  |  |  |  |  |  |  | 60 | 0 | 0 | 0 | 0 | 0 | 60 | 0
Ending balance at Mar. 31, 2013 |  |  |  |  |  |  |  |  |  | (2,870,070) | (6,015,025) | 720,071 | 0 | 3,080 | 2,172,027 | (410,695) | 660,472
Beginning balance at Dec. 31, 2013 | 978,422 | 978,422 | 505,219 | 11,661 | 0 | 450 | 185,672 | (19) | 275,439 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income (loss) |  | 248,851 | 155,942 | 92,756 | 0 | 0 | 0 | 0 | 153 |  |  |  |  |  |  |  |
Stock-based compensation |  | 1,537 | 0 | 0 | 0 | 0 | 1,537 | 0 | 0 |  |  |  |  |  |  |  |
Shares issued under equity plans |  | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |
Warrants exercised |  | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |  |  |  |  |  |  |  |
Ending balance at Mar. 31, 2014 | $ 1,228,811 | $ 1,228,811 | $ 661,161 | $ 104,417 | $ 0 | $ 450 | $ 187,210 | $ (19) | $ 275,592 |  |  |  |  |  |  |  |

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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