Income Taxes - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014
Income Taxes [Line Items]
Unrecognized tax benefits	$ 1,700,000
Unrecognized tax benefits, interest	71,000
Unrecognized tax benefits that would affect the Company's effective tax rate	270,000
Changes in the amount of unrecognized tax benefits	0
Net deferred income taxes	35,300,000
State and Foreign [Member]
Income Taxes [Line Items]
Valuation allowance of deferred tax assets	$ 7,000,000