Tax Receivable Agreements (Aggregate Payments Due Under Tax Receivable Agreements (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Remainder of 2021
2022	22,522
2023	58,063
2024	44,338
2025	94,612
Thereafter	236,605
Gross expected payments	456,140
Less: Amounts representing discount	(105,710)
Total tax receivable agreement obligation	350,430
Less: Current portion due (included in accrued expenses)	(22,522)
Tax receivable agreement long-term obligation	327,908
Related Party Tax Receivable Agreements [Member]
Related Party Transaction [Line Items]
Remainder of 2021
2022	11,606
2023	11,349
2024	23,421
2025	50,772
Thereafter	83,221
Gross expected payments	180,369
Less: Amounts representing discount	(69,149)
Total tax receivable agreement obligation	111,220
Less: Current portion due (included in accrued expenses)	(11,606)
Tax receivable agreement long-term obligation	99,614
Other Tax Receivable Agreements [Member]
Related Party Transaction [Line Items]
Remainder of 2021
2022	10,788
2023	10,722
2024	13,549
2025	20,004
Thereafter	61,192
Gross expected payments	116,255
Less: Amounts representing discount	(36,561)
Total tax receivable agreement obligation	79,694
Less: Current portion due (included in accrued expenses)	(10,788)
Tax receivable agreement long-term obligation	68,906
McKesson Tax Receivable Agreement [Member]
Related Party Transaction [Line Items]
Remainder of 2021
2022	128
2023	35,992
2024	7,368
2025	23,836
Thereafter	92,192
Gross expected payments	159,516
Total tax receivable agreement obligation	159,516
Less: Current portion due (included in accrued expenses)	(128)
Tax receivable agreement long-term obligation	$ 159,388