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Income Taxes - Summary of Gross and Tax Affected Deferred Tax Asset Recorded (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2014	Jun. 30, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Stock-based compensation		$ 9,124
Deferred rent liability		5,557
NOLs		4,720
Accrued expenses		20,645
Incentive compensation		(8,884)
Fixed assets		(5,119)
Other		217
Total deferred components		$ 26,260
Income tax rate	38.00%	38.38%
Tax affected		$ 10,079	$ 9,490

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