Acquisition - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Feb. 28, 2013
Business Acquisition [Line Items]
Intangible assets preliminarily, Amount		$ 8,860,000
Goodwill		1,784,000
Business acquisition cost of acquired entity purchase price		13,931,000
Business acquisition, purchase price allocation, capital lease obligation accrual	$ 4,700,000