Quarterly Results (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net revenues	$ 284,196	$ 275,350	$ 281,041	$ 235,995	$ 281,265	[1]	$ 124,790	[1]	$ 62,241	[1]	$ 51,667	[1]	$ 1,076,582	$ 519,963	$ 236,640
Operating income (loss)	(54,974)	64,593	45,132	30,054	40,542	[1]	(6,565)	[1]	14,407	[1]	22,802	[1]	84,805	71,186	61,508
(Loss) income from continuing operations before income taxes	(108,287)	14,612	(4,561)	(20,493)	(11,496)	[1]	(14,250)	[1]	771	[1]	16,481	[1]	(118,729)	(8,494)	23,462
Income (loss) from discontinued operations, net of taxes	(268)	29,258	9,906	20,552	4,605	[1]	4,582	[1]	2,152	[1]	57,702	[1]	59,448	69,041	7,445
Net (loss) income	$ (84,791)	$ 56,045	$ 8,143	$ (12,126)	$ (13,138)	[1]	$ 59,538	[1]	$ 1,341	[1]	$ 16,119	[1]	$ (32,729)	$ 63,860	$ 29,402
Basic:
Income (loss) from continuing operations per share	$ (0.51)	$ 0.10	$ (0.05)	$ (0.26)	$ (0.17)	[1]	$ 0.72	[1]	$ (0.02)	[1]	$ (1.02)	[1]	$ (0.70)	$ (0.17)	$ 0.52
Income from discontinued operations per share		$ 0.14	$ 0.06	$ 0.14	$ 0.03	[1]	$ 0.06	[1]	$ 0.05	[1]	$ 1.42	[1]	$ 0.37	$ 0.97	$ 0.18
Income per share	$ (0.51)	$ 0.24	$ 0.01	$ (0.12)	$ (0.14)	[1]	$ 0.78	[1]	$ 0.03	[1]	$ 0.40	[1]	$ (0.33)	$ 0.80	$ 0.70
Diluted:
Income (loss) from continuing operations per share	$ (0.51)	$ 0.10	$ (0.05)	$ (0.26)	$ (0.17)	[1]	$ 0.66	[1]	$ (0.02)	[1]	$ (1.02)	[1]	$ (0.70)	$ (0.17)	$ 0.51
Income from discontinued operations per share		$ 0.14	$ 0.06	$ 0.14	$ 0.03	[1]	$ 0.06	[1]	$ 0.05	[1]	$ 1.42	[1]	$ 0.37	$ 0.97	$ 0.17
Income per share	$ (0.51)	$ 0.24	$ 0.01	$ (0.12)	$ (0.14)	[1]	$ 0.72	[1]	$ 0.03	[1]	$ 0.40	[1]	$ (0.33)	$ 0.80	$ 0.68

[1] The fair value of the Green Bay Option was determined using inputs that are supported by little or no market activity (a Level 3 measurement). The fair value represents an estimate of the net amount that the Company would pay if the option was transferred to another party as of the date of the valuation. The option valuation incorporates a credit risk adjustment to reflect the probability of default by the Company.