Financial Guarantee Insurance Contracts Financial Guarantee Insurance Contracts - Components of Loss and Loss Expense Reserves and Subrogation Recoverable (Details) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2013	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2012
Unpaid Claims-Claims [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves			$ 2,138,952	$ 2,172,041
Subrogation recoverable			828,802	772,948
Claim liability reported on Balance Sheet, before reinsurance			2,967,754	2,944,989
Successor [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Policyholder Benefits and Claims Incurred, Ceded		$ (14,106)	(47,085)	(21,164)
Liability for Unpaid Claims and Claims Adjustment Expense, Net	$ 5,434,517	$ 5,347,877	2,814,754	3,698,378
Loss and loss expense reserves	6,106,345		4,088,106	4,752,007
Subrogation recoverable	(533,673)		(1,229,293)	(953,274)
Claim liability reported on Balance Sheet, before reinsurance			2,858,813	3,798,733
Unearned Premium Reserve [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves			(189,587)	(241,348)
Subrogation recoverable			0	0
Claim liability reported on Balance Sheet, before reinsurance			(189,587)	(241,348)
Present Value of Expected Net Cash Flows-Recoveries [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves			(1,476,276)	(1,205,621)
Subrogation recoverable			(2,407,118)	(2,018,398)
Claim liability reported on Balance Sheet, before reinsurance			(3,883,394)	(3,224,019)
Present Value of Expected Net Cash Flows- Claims and Loss Expenses [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves			3,265,349	3,792,133
Subrogation recoverable			207,674	197,751
Claim liability reported on Balance Sheet, before reinsurance			3,473,023	3,989,884
Unpaid Claims-Accrued Interest [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves			349,668	234,802
Subrogation recoverable			141,349	94,425
Claim liability reported on Balance Sheet, before reinsurance			$ 491,017	$ 329,227
Predecessor [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Policyholder Benefits and Claims Incurred, Ceded	3,889
Liability for Unpaid Claims and Claims Adjustment Expense, Net	5,434,517				$ 5,974,731
Loss and loss expense reserves	6,106,345
Subrogation recoverable	$ (533,673)