Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense on intangible assets	$ 18	$ 225
Goodwill	29,147		29,212
Decrease in goodwill offset amount due to foreign currency fluctuations	65
Gross goodwill before impairments	$ 30,896		$ 30,961