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Income Taxes - Components of the Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 6,094	$ 5,103	$ 11,644
State	2,330	1,252	2,239
Foreign	2,032	1,954	1,167
Total current	10,456	8,309	15,050
Deferred:
Federal	2,719	(723)	(6,470)
State	59	(232)	(1,095)
Foreign	(176)	(30)	39
Total deferred	2,602	(985)	(7,526)
Income tax provision	$ 13,058	$ 7,324	$ 7,524

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