Stock-based Compensation - Schedule of Restricted Stock Unit Activity (Details) - Restricted stock units	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Restricted Stock Units
Unvested outstanding at January 1, 2018 (in shares) | shares	981,276
Granted (in shares) | shares	216,312
Vested (in shares) | shares	(7,532)
Forfeited or canceled (in shares) | shares	(37,338)
Unvested outstanding at March 31, 2018 (in shares) | shares	1,152,718
Weighted Average Grant-Date Fair Value
Unvested outstanding at January 1, 2018 (in dollars per share) | $ / shares	$ 22.78
Granted (in dollars per share) | $ / shares	20.58
Vested (in dollars per share) | $ / shares	22.78
Forfeited or canceled (in dollars per share) | $ / shares	22.74
Unvested outstanding at March 31, 2018 (in dollars per share) | $ / shares	$ 22.37