Income Taxes (Components of Provision for Income Taxes) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 15,376	$ 18,291	$ 8,069
State	1,513	1,204	1,334
Foreign	2,104	1,684	3,883
Total Current	18,993	21,179	13,286
Deferred:
Federal	(594)	1,583	(42)
State	601	1,696	(1,626)
Foreign	(1,179)	306	191
Total Deferred	(1,172)	3,585	(1,477)
Provision for income taxes	$ 17,821	$ 24,764	$ 11,809