Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 38,357	$ 31,700	$ 26,071
State and local	7,180	6,505	5,958
Foreign	4,346	1,456	1,014
Total current provision	49,883	39,661	33,043
Deferred:
Federal	1,492	3,583	5,507
State and local	299	530	812
Foreign	189	(44)	(645)
Total deferred provision	1,980	4,069	5,674
Provision for income taxes	$ 51,863	$ 43,730	$ 38,717