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Schedule IV - Reinsurance (Notes) | 12 Months Ended
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Dec. 31, 2014
Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract] |
Schedule IV - Reinsurance | AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES SCHEDULE IV— REINSURANCE Year Ended December 31, 2014 Eight Months Ended December 31, 2013 and Four Months Ended April 30, 2013 Year Ended December 31, 2012
Insurance Premiums Written ($ in Thousands) | Gross Amount |  | Ceded to Other Companies |  | Assumed from Other Companies |  | Net Amount |  | Percentage of Amount Assumed to Net
Successor Ambac |  |  |  |  |  |  |  |  |
Year ended December 31, 2014 | $ | (288,310 | ) |  | $ | (6,842 | ) |  | $ | — |  |  | $ | (281,468 | ) |  | —%
Successor Ambac |  |  |  |  |  |  |  |  |
Eight months ended December 31, 2013 | (80,309 | ) |  | (7,810 | ) |  | — |  |  | (72,499 | ) |  | —%
Predecessor Ambac |  |  |  |  |  |  |  |  |
Four months ended April 30, 2013 | (14,125 | ) |  | (1,098 | ) |  | — |  |  | (13,027 | ) |  | —%
Predecessor Ambac |  |  |  |  |  |  |  |  |
Year ended December 31, 2012 | (277,508 | ) |  | (23,371 | ) |  | — |  |  | (254,137 | ) |  | —%

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- Definition The entire disclosure for the supplemental schedule of reinsurance information. Reinsurance schedule includes, but is not limited to, the type of insurance, gross amount of premiums, premiums ceded to other entities, premiums assumed from other entities, net amount of premium revenue, and the percentage of the premiums assumed to net premium revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 17 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.7-05.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=6879921&loc=d3e569147-122900 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 05 -Article 7 + Details
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