Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Current:
Federal	$ 8,315	$ 7,078
State and local	1,458	1,289
Foreign	1,546	1,135
Total current provision	11,319	9,502
Deferred:
Federal	1,539	4,977
State and local	166	713
Foreign	120	215
Total deferred provision	1,825	5,905
Provision for income taxes	$ 13,144	$ 15,407