Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 2,235,000		$ 2,235,000		$ 2,235,000
Amortization expense	$ 42,000	$ 38,000	$ 81,000	$ 76,000