Income Taxes - Schedule of Effective Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Computed “expected” tax provision (benefit)	$ 11,700	$ 14,700	$ 15,500
Change in income tax resulting from:
State taxes, net of federal benefit	1,400	2,500	2,100
Foreign taxes			100
Other		(800)	700
Total provision (benefit) for taxes	$ 13,121	$ 16,414	$ 18,444