Income Taxes - Schedule of Company's Provision (benefit) For Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Provision (benefit) for income taxes:
Deferred - Total	$ 181	$ 1,089	$ 93
Other Liability [Member]
Provision (benefit) for income taxes:
Current - Federal	2,784	(35)	(8)
Current - State and local	227	52	(33)
Current - Foreign	535	332	977
Current - Total	3,546	349	936
Deferred - Federal	670	1,077	162
Deferred - State and local	(378)	(7)	(9)
Deferred - Foreign	(18)	14	(63)
Deferred - Total	274	1,084	90
Total provision for income taxes	$ 3,820	$ 1,433	$ 1,026