Income Taxes - Schedule of Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current
Federal									$ 348
Foreign									2,068	2,053	2,137
State and local									26
Total current expense									2,442	2,053	2,137
Deferred expense
Federal									366
Foreign									9	85	35
State and local									27
Total deferred expense									402	85	35
Provision for income tax expense	$ 1,111	$ 702	$ 577	$ 454	$ 398	$ 636	$ 638	$ 466	$ 2,844	$ 2,138	$ 2,172