Financial Guarantee Insurance Contracts - Estimated Future Amortization Expense for Insurance Intangible Asset (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2014
Insurance Intangible Asset [Member]
Amortization Of Intangible Assets [Line Items]
2014	$ 33,238			$ 33,238
2015	122,516			122,516
2016	110,532			110,532
2017	100,993			100,993
2018	93,711			93,711
Thereafter	1,014,022			1,014,022
Successor [Member]
Amortization Of Intangible Assets [Line Items]
Amortization of insurance intangible assets	41,908	37,473	62,425	109,878
Successor [Member] | Insurance Asset [Member]
Amortization Of Intangible Assets [Line Items]
Amortization of insurance intangible assets	$ 41,908	$ 37,473	$ 62,425	$ 109,878