Share-Based Compensation - Unvested RSAs Outstanding (Details) - RSAs	3 Months Ended
	Mar. 31, 2017 $ / shares shares
Number of Shares
Unvested RSAs, Beginning Balance (in shares) | shares	328,347
Granted (in shares) | shares	3,332
Vested (in shares) | shares	(76,951)
Forfeited (in shares) | shares	(2,682)
Unvested RSAs, Ending Balance (in shares) | shares	252,046
Weighted-Average Grant Date Fair Value
Unvested RSAs, Beginning Balance (in dollars per share) | $ / shares	$ 22.87
Granted (in dollars per share) | $ / shares	39.32
Vested (in dollars per share) | $ / shares	20.43
Forfeited (in dollars per share) | $ / shares	23.02
Unvested RSAs, Ending Balance (in dollars per share) | $ / shares	$ 23.83