Income Taxes - Summary of Gross and Tax Affected Deferred Tax Asset Recorded (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Stock-based compensation	$ 15,689
Deferred rent liability	5,703
Other	111
Total gross deferred tax asset	21,503
Income tax rate	38.38%
Tax affected	$ 8,253	$ 13,725