Equity Incentive Plans - Summary of Activity Related to Outstanding Stock Options (Details)	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Service Period Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Outstanding Beginning Balance | shares	2,788,285
Shares, Granted | shares	340,618
Shares, Exercised | shares	(492,493)
Shares, Forfeited | shares	(3,572)
Shares, Outstanding Ending Balance | shares	2,632,838
Weighted Average Exercise Price, Outstanding Beginning Balance | $ / shares	$ 8.61
Weighted Average Exercise Price, Granted | $ / shares	11.00
Weighted Average Exercise Price, Exercised | $ / shares	7.20
Weighted Average Exercise Price, Forfeited | $ / shares	13.94
Weighted Average Exercise Price, Outstanding Ending Balance | $ / shares	$ 14.70
Performance-Vested Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Outstanding Beginning Balance | shares	1,357,561
Shares, Granted | shares	110,741
Shares, Expired | shares	(26,156)
Shares, Forfeited | shares	(2,936)
Shares, Outstanding Ending Balance | shares	1,439,210
Weighted Average Exercise Price, Outstanding Beginning Balance | $ / shares	$ 10.24
Weighted Average Exercise Price, Granted | $ / shares	11.00
Weighted Average Exercise Price, Expired | $ / shares	8.87
Weighted Average Exercise Price, Forfeited | $ / shares	15.00
Weighted Average Exercise Price, Outstanding Ending Balance | $ / shares	$ 10.31
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Outstanding Beginning Balance | shares	97,515
Shares, Granted | shares	115,320
Shares, Issued Upon Vesting | shares	(59,088)
Shares, Outstanding Ending Balance | shares	153,747
Weighted-Average Grant-Date Fair Value Per Unit, Outstanding Beginning Balance | $ / shares	$ 9.05
Weighted-Average Grant-Date Fair Value Per Unit, Granted | $ / shares	11.00
Weighted-Average Grant-Date Fair Value Per Unit, Issued Upon Vesting | $ / shares	9.05
Weighted-Average Grant-Date Fair Value Per Unit, Outstanding Ending Balance | $ / shares	$ 10.51