Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	7 Months Ended		12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012	Dec. 31, 2011	May 31, 2010
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Current tax provision, Federal	$ (2,353)		$ 1,610	$ 2,827	$ 8,119
Current tax provision, State	1,245		3,793	4,685	6,324
Current tax provision, Foreign	510		5,184	2,483	0
Current tax provision	(598)		10,587	9,995	14,443
Deferred tax provision, Federal	3,376		(24,196)	36,637	24,458
Deferred tax provision, State	(238)		(2,473)	(2,391)	1,765
Deferred tax provision, Foreign	66		(225)	(371)	0
Deferred tax provision	3,204		(26,894)	33,875	26,223
Provision for income taxes	$ 2,606	$ 18,596	$ (16,307)	$ 43,870	$ 40,666