Financial Guarantee Insurance Contracts - Estimated Future Amortization Expense for Insurance Intangible Asset (Detail) - Successor [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Amortization Of Intangible Assets [Line Items]
Amortization of insurance intangible assets	$ 38,088	$ 36,256	$ 75,520	$ 67,970
Intangible Assets, Gross (Excluding Goodwill)	1,665,087		1,665,087		$ 1,660,125
Accumulated amortization on insurance intangible asset	325,660		325,660		$ 249,205
2015	60,630		60,630
2016	109,308		109,308
2017	99,248		99,248
2018	91,385		91,385
2019	84,630		84,630
Thereafter	$ 894,226		$ 894,226