Equity Incentive Plans - Summary of Activity Related to Outstanding Stock Options (Details)	6 Months Ended
	Jun. 30, 2016 $ / shares shares
Service Period Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Outstanding Beginning Balance | shares	1,976,810
Number of Options, Granted | shares	345,131
Number of Options, Forfeited, Canceled, Expired | shares	(4,771)
Number of Options, Exercised | shares	(36,864)
Number of Options, Outstanding Ending Balance | shares	2,280,306
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 8.00
Weighted Average Exercise Price, Granted	9.05
Weighted Average Exercise Price, Forfeited, Canceled, Expired	8.95
Weighted Average Exercise Price, Exercised	6.32
Weighted Average Exercise Price, Outstanding Ending Balance	$ 8.18
Performance-Vested Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Outstanding Beginning Balance | shares	916,183	[1]
Number of Options, Granted | shares	117,759	[1]
Number of Options, Forfeited, Canceled, Expired | shares	(1,120)	[1]
Number of Options, Outstanding Ending Balance | shares	1,032,822	[1]
Weighted Average Exercise Price, Outstanding Beginning Balance	$ 9.34
Weighted Average Exercise Price, Granted	9.05
Weighted Average Exercise Price, Forfeited, Canceled, Expired	15.00
Weighted Average Exercise Price, Exercised	0.00
Weighted Average Exercise Price, Outstanding Ending Balance	$ 9.30
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of RSUs, Granted | shares	105,313
Number of RSUs, Outstanding Ending Balance | shares	105,313
Weighted Average Grant Date Fair Value, Granted	$ 9.05
Weighted Average Grant Date Fair Value, Outstanding Ending Balance	$ 9.05

[1] As of June 30, 2016, 117,759 performance-vested stock options at a weighted average exercise price of $9.05 have performance metrics that are probable of achievement. These shares are included in share-based compensation costs for the three and six months ended June 30, 2016.