Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Current:
Federal	$ 7,078	$ 7,316
State and local	1,289	1,478
Foreign	1,135	520
Total current provision	9,502	9,314
Deferred:
Federal	4,977	3,840
State and local	713	624
Foreign	215	131
Total deferred provision	5,905	4,595
Provision for income taxes	$ 15,407	$ 13,909