Income Taxes - Schedule of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Current:
Federal	$ 9,089	$ (2,554)	$ 12,597	$ 1,011
State and local	1,819	(298)	2,898	872
Foreign	418	(31)	290	(121)
Total current provision	11,326	(2,883)	15,785	1,762
Deferred:
Federal	989	9,473	4,736	13,018
State and local	184	2,120	863	2,992
Foreign	(331)	(139)	(229)	54
Total deferred provision	842	11,454	5,370	16,064
Provision for income taxes	$ 12,168	$ 8,571	$ 21,155	$ 17,826