Intangible Assets and Goodwill - Schedule of Changes in Goodwill (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Beginning Balance	$ 71,039,000	$ 41,882,000
Goodwill derecognized upon sale of related assets		(1,149,000)
Goodwill recognized in acquisition	2,032,000	30,178,000
Effect of changes in foreign currency exchange rates	(290,000)	128,000
Ending Balance	$ 72,781,000	$ 71,039,000