Equity-Based Compensation - Class B Units (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares	Dec. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion ratio	1.25
Class B Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Participation threshold (in dollars per share)			$ 12.00
Conversion ratio	0.80
Number of Class B Units (in thousands)
Outstanding, Beginning of Period (in shares) | shares	6,393	7,421	6,740
Granted (in shares) | shares	0	0	767
Exchanged (in shares) | shares	(1,202)	(901)	(51)
Forfeited (in shares) | shares	(23)	(127)	(35)
Outstanding, End of Period (in shares) | shares	5,168	6,393	7,421
Vested, End of Period (in shares) | shares	4,416
Expected to vest, End of Period (in shares) | shares	752
Weighted-Average Participation Threshold per Class B Unit
Outstanding, Beginning of Period (in dollars per share)	$ 3.08	$ 2.95	$ 1.91
Granted (in dollars per share)			12.00
Exchanged (in dollars per share)	1.17	0.96	1.81
Forfeited (in dollars per share)	5.23	10.49	3.48
Outstanding, End of Period (in dollars per share)	3.51	$ 3.08	$ 2.95
Vested, End of Period (in dollars per share)	2.87
Expected to vest, End of Period (in dollars per share)	$ 7.28
Class B Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Participation threshold (in dollars per share)	$ 0.00
Weighted-Average Participation Threshold per Class B Unit
Granted (in dollars per share)	$ 0.00
Class B Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
Participation threshold (in dollars per share)	$ 12.00
Weighted-Average Participation Threshold per Class B Unit
Granted (in dollars per share)	$ 12.00