Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Federal, Current	$ 18,453	$ 11,748	$ (306)
State, Current	3,681	2,997	(1)
Foreign, Current	4,941	7,565	7,638
Income tax expense (benefit), Current, total	27,075	22,310	7,331
Federal, Deferred	(4,742)	9,215	(2,132)
State, Deferred	(890)	693	(1,038)
Foreign, Deferred	695	(285)	1,855
Income tax expense (benefit), Deferred, total	(4,937)	9,623	(1,315)
Total provision	$ 22,138	$ 31,933	$ 6,016