Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Trade name	$ 5,700	$ 5,700
Customer relationships	9,611	9,611
Intangible Assets, gross	15,311	15,311
Less accumulated amortization	(5,628)	(4,975)
Intangible Assets, net	$ 9,683	$ 10,336
Estimated useful life (In years), Customer relationships	11 years