Income Taxes - Components of the Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 5,103	$ 11,644	$ 8,286
State	1,252	2,239	1,624
Foreign	1,954	1,167	1,587
Total current	8,309	15,050	11,497
Deferred:
Federal	(723)	(6,470)	(3,935)
State	(232)	(1,095)	(562)
Foreign	(30)	39	(32)
Total deferred	(985)	(7,526)	(4,529)
Income tax provision	$ 7,324	$ 7,524	$ 6,968