Income Taxes (Summary Of Components Of Provision For Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	7 Months Ended		12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011	May 31, 2010	May 31, 2009
Income Taxes [Abstract]
Current tax provision, Federal	$ (2,353)		$ 2,827	$ 8,119	$ 3,705
Current tax provision, State	1,245		4,685	6,324	4,399
Current tax provision, Foreign	510		2,483	0	0
Current tax provision	(598)		9,995	14,443	8,104
Deferred tax provision, Federal	3,376		36,637	24,458	10,816
Deferred tax provision, State	(238)		(2,391)	1,765	(544)
Deferred tax provision, Foreign	66		(371)	0	0
Deferred tax provision	3,204		33,875	26,223	10,272
Provision for income taxes	$ 2,606	$ 18,596	$ 43,870	$ 40,666	$ 18,376