Schedule of Components of Current and Deferred Income Tax Benefit From Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax [Line Items]
Current, Federal
Current, State						(4,071)	(9)
Current, Foreign
Total current benefit						(4,071)	(9)
Deferred, Federal						(20,423)
Deferred, State						(2,294)
Deferred, Foreign
Total deferred benefit						(22,717)
Total income tax benefit	$ (7,733)	$ (6,245)	$ (5,400)	$ (7,410)		$ (26,788)	$ (9)