Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 28,403		$ 29,212
Decrease in goodwill offset amount due to foreign currency fluctuations	809
Gross goodwill before impairments	30,152		30,961
Aggregate amortization expense on intangible assets	$ 54	$ 267