Consolidated Statements of Cash Flows - Successor [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income attributable to common stockholders	$ 9,415	$ 214,711
Net (loss) gain	0	(160)
Net income	9,415	214,871
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	303	791
Amortization of bond premium and discount	(26,336)	(31,477)
Share-based compensation	1,082	393
Deferred income taxes	(446)	(174)
Current income taxes	(2,463)	(3,368)
Unearned premiums, net	(77,230)	(84,582)
Losses and loss expenses, net	800,946	(197,332)
Ceded premiums payable	(6,156)	(1,168)
Investment income due and accrued	(122)	21
Premium receivables	49,497	48,608
Accrued interest payable	16,152	18,269
Amortization of insurance intangible assets	50,890	37,432
Net mark-to-market (gains) losses	(12,614)	2,918
Net realized investment gains	$ (1,102)	(54,101)
Financial Guarantee Insurance Contracts, Premium Received over Contract Period, Premium Receivable, Weighted Average Collection Period	9 years 2 months 12 days
Other-than-temporary impairment charges	$ 9,334	3,119
Net realized (gains) losses on extinguishment of debt	(1,235)	93
Variable interest entity activities	27,163	(6,962)
Other, net	(9,398)	58,229
Net cash provided by operating activities	827,680	5,580
Cash flows from investing activities:
Proceeds from sales of bonds	136,087	487,462
Proceeds from matured bonds	297,619	299,715
Purchases of bonds	(1,002,328)	(919,361)
Proceeds from sales of other invested assets	2,991	36,543
Purchases of other invested assets	(15,690)	(10,176)
Change in short-term investments	(210,971)	139,085
Loans, net	97	220
Change in swap collateral receivable	(29,788)	(37,239)
Other, net	8,025	779
Net cash (used in) investing activities	(813,958)	(2,972)
Cash flows from financing activities:
Paydowns of a secured borrowing	(8,871)	0
Proceeds from warrant exercises	0	2
Payments for investment agreement draws	0	(49,872)
Payments for extinguishment of long-term debt	(11,453)	0
Net cash (used in) financing activities	(20,324)	(49,870)
Net cash flow	(6,602)	(47,262)
Cash and cash equivalents at beginning of period	35,744	73,903
Cash and cash equivalents end of period	35,744	73,903
Supplemental disclosure of cash flow information:
Income taxes	6,477	4,933
Interest on secured borrowing	1,372	0
Interest on investment agreements	$ 146	$ 88