Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 2,235,000	$ 0
Amortization expense	$ 200,000	$ 100,000	$ 200,000