Income Taxes - Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Income Taxes [Line Items]
Current (benefit) provision for taxes, Federal	$ (1,237)
Current (benefit) provision for taxes, Foreign	3,769	1,608	897
Current (benefit) provision for taxes, State	2,702	2,191	845
Total current	5,234	3,799	1,742
Deferred (benefit) provision for taxes, Federal income taxes	(53,501)	(38,303)	(59,363)
Deferred (benefit) provision for taxes, State and local taxes	(13,750)	(5,111)	(6,083)
Deferred (benefit) provision for taxes, Foreign tax	(1)	(1,104)	(388)
Deferred (benefit) provision for taxes, Increase in valuation allowance	68,612	42,832	65,097
Deferred income tax expense benefits	1,360	(1,686)	(737)
Total provision for income taxes	$ 6,594	$ 2,113	$ 1,005