Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Oct. 12, 2015	Sep. 30, 2015	Sep. 30, 2014
Stockholders' Equity Note [Abstract]
Options vesting and exercisable period, maximum		8 years
Options termination period		9 years
Total stock-based compensation expense		$ 4,641	$ 4,620
Total unrecognized stock-based compensation expense		$ 16,296
Weighted average period over which total unrecognized stock-based compensation expense will be recognized		4 years 9 months 10 days
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividend declared per share	$ 0.28