Income Taxes - Income Tax Provision (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ (2,373)	$ 3,265	$ 5,094
State	34	516	1,747
Foreign	128	171	188
Total current	(2,211)	3,952	7,029
Deferred:
Federal	1,700	(172)	(1,025)
State	(157)	258	(349)
Foreign	11	147
Total deferred	1,554	233	(1,374)
(Benefit from) provision for income taxes	$ (657)	$ 4,185	$ 5,655