Equity-Based Compensation - Equity-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 23,558	$ 664	$ 96,618	$ 1,329
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	53	74	140	319
SAR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	282	327	171	323
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	0	263	(38)	687
BMP equity units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	12,392	0	51,515	0
REUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation	$ 10,831	$ 0	$ 44,830	$ 0