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Consolidated Statements of Total Comprehensive Income - Successor [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Revenues: |  |  |  |
Net premiums earned | $ 71,535 | $ 64,831 | $ 198,132 | $ 212,391
Net investment income: |  |  |  |
Securities available-for-sale and short-term | 65,619 | 82,881 | 191,229 | 228,570
Other investments | (1,424) | 700 | 10,702 | 5,905
Total net investment income | 64,195 | 83,581 | 201,931 | 234,475
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities | 31,743 | 4,715 | 43,495 | 19,737
Other-than-temporary impairment losses: |  |  |  |
Portion of other-than-temporary impairment recognized in other comprehensive income | 22,593 | (296) | 30,206 | (4,420)
Net other-than-temporary impairments | (9,150) | (5,011) | (13,289) | (24,157)
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments | 2,106 | 10,045 | 50,854 | 29,401
Gain (Loss) on Sale of Derivatives | 1,693 | 596 | 2,519 | 2,088
Change in fair value of credit derivatives: |  |  |  |
Unrealized gains (losses) | 35,259 | 6,820 | 42,227 | 11,491
Net change in fair value of credit derivatives | 36,952 | 7,416 | 44,746 | 13,579
Derivative products | (65,083) | (15,685) | (51,858) | (117,511)
Net realized gains (losses) on extinguishment of debt | 1,420 | 0 | 81 | 0
Other income (expense) | 7,150 | 1,046 | 5,206 | 8,206
Income (loss) on variable interest entities | (21,435) | 9,116 | 38,130 | (34,574)
Total revenues | 87,690 | 155,339 | 473,933 | 321,810
Expenses: |  |  |  |
Losses and loss expense (benefit) | (133,213) | (28,698) | (431,642) | 6,608
Insurance intangible amortization | 39,680 | 41,908 | 115,200 | 109,878
Underwriting and operating expenses | 25,006 | 25,513 | 75,402 | 75,332
Interest expense | 29,899 | 31,841 | 85,980 | 96,122
Goodwill, Impairment Loss | 514,511 | 0 | 514,511 | 0
Total expenses (benefit) | 475,883 | 70,564 | 359,451 | 287,940
Pre-tax income (loss) before reorganization items | (388,193) | 84,775 | 114,482 | 33,870
Reorganization items | 0 | 2 | 0 | 211
Pre-tax income (loss) | (388,193) | 84,773 | 114,482 | 33,659
Provision for income taxes | 2,838 | 2,344 | 8,464 | 3,414
Net income (loss) | (391,031) | 82,429 | 106,018 | 30,245
Less: net (gain) loss attributable to noncontrolling interest | (44) | (21) | (401) | (242)
Net income (loss) attributable to common shareholders | (390,987) | 82,450 | 106,419 | 30,487
Other comprehensive income (loss), after tax: |  |  |  |
Net income (loss) | (391,031) | 82,429 | 106,018 | 30,245
Unrealized gains (losses) on securities, net of deferred income taxes of $0 | 8,382 | (17,225) | (122,905) | 256,660
Gains (losses) on foreign currency translation, net of deferred income taxes of $0 | (30,909) | (38,429) | (24,224) | (17,001)
Changes to postretirement benefit, net of tax of $0 | (220) | (204) | (467) | (612)
Total other comprehensive income (loss), net of tax | (22,747) | (55,858) | (147,596) | 239,047
Total comprehensive income (loss) | (413,778) | 26,571 | (41,578) | 269,292
Less: comprehensive (loss) gain attributable to the noncontrolling interest: |  |  |  |
Net (gain) loss | (44) | (21) | (401) | (242)
Currency translation adjustments | (272) | (395) | (200) | (157)
Total comprehensive income (loss) attributable to Ambac Financial Group, Inc. | $ (413,462) | $ 26,987 | $ (40,977) | $ 269,691
Net income (loss) per share attributable to Ambac Financial Group, Inc. common shareholders | $ (8.66) | $ 1.83 | $ 2.36 | $ 0.68
Basic | $ (8.66) | $ 1.77 | $ 2.30 | $ 0.65

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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569643-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 3: 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=51664549&loc=SL4569616-111683 + Details
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- Definition Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 + Details
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- Definition Reflects the sum of all other revenue and income recognized by the entity in the period not otherwise specified in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.4) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
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- Definition Costs incurred during the period, such as those relating to general administration and policy maintenance that do not vary with and are not primarily related to the acquisition or renewal of insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.7) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 720 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35755714&loc=d3e28434-158551 + Details
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