Share-Based Compensation - Unvested RSAs Outstanding (Details) - RSAs	3 Months Ended
	Mar. 31, 2016 $ / shares shares
Number of Shares
Unvested RSAs, Beginning Balance (in shares) | shares	354,504
Granted (in shares) | shares	110,623
Vested (in shares) | shares	(101,984)
Forfeited (in shares) | shares	(419)
Unvested RSAs, Ending Balance (in shares) | shares	362,724
Weighted-Average Grant Date Fair Value
Unvested RSAs, Beginning Balance (in dollars per share) | $ / shares	$ 19.65
Granted (in dollars per share) | $ / shares	23.41
Vested (in dollars per share) | $ / shares	15.32
Forfeited (in dollars per share) | $ / shares	21.60
Unvested RSAs, Ending Balance (in dollars per share) | $ / shares	$ 22.31