Components of (Benefit) Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components Of Income Tax Expense Benefit [Line Items]
Current, Federal	$ 12,128	$ 11,698	$ (376)
Current, State	971	1,775	292
Current, Foreign	2,142	2,501	1,352
Total current provision	15,241	15,974	1,268
Deferred, Federal	(4,759)	(13,978)	(4,622)
Deferred, State	(870)	(2,204)	2,486
Deferred, Foreign	(535)	913	562
Total deferred (benefit) provision	(6,164)	(15,269)	(1,574)
Total provision (benefit)	$ 9,077	$ 705	$ (306)