Income Taxes - Schedule of Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ 5,166	$ 6,234	$ 4,957
State	1,660	388	892
Foreign	2,834	939	3,191
Current Income Tax Expense (Benefit), Total	9,660	7,561	9,040
Deferred:
Federal	1,144	(2,479)	(2,794)
State	56	114	(409)
Foreign	(1,242)	(758)	(547)
Deferred income tax expense (benefit)	(42)	(3,123)	(3,750)
Income tax provision from continuing operations	$ 9,618	$ 4,438	$ 5,290