Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Change in Company's recorded goodwill	$ 0	$ 0	$ 0	$ 0
Amortization expense of intangible assets	101	241	209	482
Expiration of amortization	between 2013 and 2016
Amortization from capitalized software development costs	$ 116	$ 25	$ 181	$ 42