Equity-based Compensation Plans - Summary of Equity-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Equity-based compensation expense:
Equity based compensation expense	$ 2,934	$ 4,188	$ 9,513	$ 10,535
Costs applicable to revenue
Equity-based compensation expense:
Equity based compensation expense	231	223	646	570
Selling, general, and administrative
Equity-based compensation expense:
Equity based compensation expense	$ 2,703	$ 3,965	$ 8,867	$ 9,965