Income Taxes - Summary of Deferred Tax Asset and Tax Affected Benefit Recorded (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]
NOLs available for deferred tax asset	$ 11,940
Stock-based compensation	13,437
Deferred rent liability	4,726
Other	108
Gross net operating losses used for deferred tax asset	30,211
Income tax rate	45.43%
Tax affected	$ 13,725