Quarterly Results (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 275,458	$ 262,535	$ 270,306	$ 217,839	$ 263,608	$ 256,371	$ 261,861	$ 220,432	$ 1,026,138	$ 1,002,272	$ 466,044
Operating income (loss)	31,317	62,820	73,952	19,277	(63,306)	56,600	37,716	25,927	187,366	56,937	50,056
(Loss) income from continuing operations before income taxes	(42,837)	17,487	25,187	(24,688)	(116,625)	6,624	(11,977)	(24,624)	(24,851)	(146,602)	(29,602)
Income (loss) from discontinued operations, net of taxes	106,263	(3,455)	11,987	17,675	1,838	52,076	15,403	9,886	132,470	79,203	82,203
Net income (loss)	$ 150,933	$ 7,037	$ 27,101	$ (8,988)	$ (84,791)	$ 56,049	$ 8,143	$ (12,130)	$ 176,083	$ (32,729)	$ 63,860
Basic:
(Loss) income from continuing operations per share	$ 0.20	$ 0.03	$ 0.05	$ (0.17)	$ (0.52)	$ (0.01)	$ (0.09)	$ (0.19)	$ 0.15	$ (0.82)	$ (0.36)
Income from discontinued operations per share	$ 0.46	$ (0.02)	$ 0.06	$ 0.10	$ 0.01	$ 0.31	$ 0.10	$ 0.06	$ 0.61	$ 0.49	$ 1.16
(Loss) income per share	$ 0.66	$ 0.01	$ 0.11	$ (0.07)	$ (0.51)	$ 0.30	$ 0.01	$ (0.13)	$ 0.76	$ (0.33)	$ 0.80
Diluted:
(Loss) income from continuing operations per share	$ 0.19	$ 0.03	$ 0.05	$ (0.17)	$ (0.52)	$ (0.01)	$ (0.09)	$ (0.19)	$ 0.15	$ (0.82)	$ (0.36)
Income from discontinued operations per share	$ 0.45	$ (0.02)	$ 0.06	$ 0.10	$ 0.01	$ 0.31	$ 0.10	$ 0.06	$ 0.60	$ 0.49	$ 1.16
(Loss) income per share	$ 0.64	$ 0.01	$ 0.11	$ (0.07)	$ (0.51)	$ 0.30	$ 0.01	$ (0.13)	$ 0.75	$ (0.33)	$ 0.80