Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Current:
Federal	$ 10,546	$ 9,774	$ 17,624	$ 17,090
State and local	1,871	1,720	3,160	3,198
Foreign	1,750	1,434	2,885	1,955
Total current provision	14,167	12,928	23,669	22,243
Deferred:
Federal	2,836	64	7,813	3,904
State and local	406	6	1,119	630
Foreign	16	(177)	231	(47)
Total deferred provision	3,258	(107)	9,163	4,487
Provision for income taxes	$ 17,425	$ 12,821	$ 32,832	$ 26,730