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Income Taxes - Summary of Gross and Tax Affected Deferred Tax Asset Recorded (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Stock-based compensation		$ 10,303
Deferred rent liability		5,509
NOLs		4,720
Accrued expenses		30,180
Incentive compensation		(7,996)
Fixed assets		(5,119)
Other		218
Total deferred components		$ 37,815
Income tax rate	38.00%	38.67%
Tax affected		$ 14,623	$ 9,490

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