Financial Guarantee Insurance Contracts Financial Guarantee Insurance Contracts - Components of Loss and Loss Expense Reserves and Subrogation Recoverable (Details) - Successor [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered	$ 4,662	$ (130)	$ 4,662	$ (130)	$ (517)
Loss Reserves Ceded To Reinsurers	63,657	105,641	63,657	105,641	100,355
Policyholder Benefits and Claims Incurred, Ceded	(6,907)	(3,885)	(30,727)	(16,045)
Liability for Unpaid Claims and Claims Adjustment Expense, Net		$ 5,408,596		$ 5,408,596
Loss and loss expense reserves	4,237,515		4,237,515		4,752,007
Subrogation recoverable	(982,202)		(982,202)		(953,274)
Claim liability reported on Balance Sheet, before reinsurance	3,255,313		3,255,313		3,798,733
Unpaid Claims-Claims [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves	2,193,214		2,193,214		2,172,041
Subrogation recoverable	785,993		785,993		772,948
Claim liability reported on Balance Sheet, before reinsurance	2,979,207		2,979,207		2,944,989
Unpaid Claims-Accrued Interest [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves	324,125		324,125		234,802
Subrogation recoverable	125,225		125,225		94,425
Claim liability reported on Balance Sheet, before reinsurance	449,350		449,350		329,227
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	3,137,857		3,137,857		3,792,133
Subrogation recoverable	148,147		148,147		197,751
Claim liability reported on Balance Sheet, before reinsurance	3,286,004		3,286,004		3,989,884
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	(1,238,561)		(1,238,561)		(1,205,621)
Subrogation recoverable	(2,041,567)		(2,041,567)		(2,018,398)
Claim liability reported on Balance Sheet, before reinsurance	(3,280,128)		(3,280,128)		(3,224,019)
Unearned Premium Reserve [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Loss and loss expense reserves	(179,120)		(179,120)		(241,348)
Subrogation recoverable	0		0		0
Claim liability reported on Balance Sheet, before reinsurance	$ (179,120)		$ (179,120)		$ (241,348)