Equity - Stock Option Activity (Details) - The 2016 Incentive Plan - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance beginning of period (in shares)	5,882,861
Options Granted (in shares)	673,062
Options Exercised (in shares)	(920,662)
Options Forfeited (in shares)	(217,617)
Balance end of period (in shares)	5,417,644	5,882,861
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning balance, Weighted Average Exercise Price (in dollars per share)	$ 4.81
Granted, Weighted Average Exercise Price (in dollars per share)	9.57
Exercised, Weighted Average Exercise Price (in dollars per share)	4.04
Forfeited, Weighted Average Exercise Price (in dollars per share)	6.47
Ending balance, Weighted Average Exercise Price (in dollars per share)	$ 5.46	$ 4.81
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Beginning balance, Weighted Average Remaining Contractual Life	6 years 7 months 6 days	6 years 3 months 18 days
Ending balance, Weighted Average Remaining Contractual Life	6 years 7 months 6 days	6 years 3 months 18 days
Beginning balance, Aggregate Intrinsic Value	$ 15,100	$ 32,683
Ending balance, Aggregate Intrinsic Value	$ 15,100	$ 32,683
Vested and exercisable as of ending balance, Options (in shares)	3,570,351
Vested and exercisable as of ending balance, Weighted Average Exercise Price (in dollars per share)	$ 4.75
Vested and exercisable as of ending balance, Weighted Average Remaining Contractual Term	5 years 8 months 12 days
Vested and exercisable as of ending balance, Aggregate Intrinsic Value	$ 11,672
Vested and exercisable as of September 30, 2017 and expected to vest thereafter, Options (in shares)	5,121,800
Vested and exercisable as of September 30, 2017 and expected to vest thereafter, Weighted Average Exercise Price (in dollars per share)	$ 5.34
Vested and exercisable as of September 30, 2017 and expected to vest thereafter, Weighted Average Remaining Contractual Term	6 years 6 months
Vested and exercisable as of September 30, 2017 and expected to vest thereafter, Aggregate Intrinsic Value	$ 14,686
Share price	$ 7.90	$ 10.35