Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
U.S. Federal	$ 7,976	$ 7,494	$ 1,188
State	1,851	2,139	1,803
Foreign	1,645	1,572	2,217
Current income tax expense (benefit)	11,472	11,205	5,208
Deferred:
U.S. Federal	13,201	17,986	21,067
State	1,538	1,927	1,818
Foreign	(304)	(266)	(116)
Deferred income tax expense (benefit)	14,435	19,647	22,769
Total	$ 25,907	$ 30,852	$ 27,977