Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Apr. 11, 2017	Mar. 31, 2017	Mar. 31, 2016
Stockholders' Equity Note [Abstract]
Options vesting and exercisable period, maximum		8 years
Options termination period		9 years
Total stock-based compensation expense		$ 1.2	$ 1.0
Total unrecognized stock-based compensation expense		$ 18.4
Weighted average period over which total unrecognized stock-based compensation expense will be recognized		4 years 9 months 7 days
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividend declared (in dollars per share)	$ 0.32