Income Taxes - Schedule of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Current:
Federal	$ 8,023	$ 9,020	$ 13,017	$ 13,262
State and local	1,587	1,806	2,773	2,894
Foreign	561	418	294	290
Total current provision	10,171	11,244	16,084	16,446
Deferred:
Federal	1,002	1,029	4,333	4,265
State and local	74	191	585	777
Foreign	(367)	(331)	111	(229)
Total deferred provision	709	889	5,029	4,813
Provision for income taxes	$ 10,880	$ 12,133	$ 21,113	$ 21,259