Tax Receivable Agreements (Aggregate Payments Due Under Tax Receivable Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
Related Party Transaction [Line Items]
Remainder of 2021
2022	22,394
2023	67,468
2024	45,909
2025	26,358
Thereafter	132,420
Gross expected payments	294,549
Less: Amounts representing discount	(111,285)
Total tax receivable agreement obligations due to related parties	183,264
Less: Current portion due	(22,394)
Tax receivable agreement long-term obligations due to related parties	160,870	$ 177,826
Tax Receivable Agreements 2009-2011 [Member]
Related Party Transaction [Line Items]
Remainder of 2021
2022	20,113
2023	20,084
2024	19,358
2025	17,917
Thereafter	102,941
Gross expected payments	180,413
Less: Amounts representing discount	(53,572)
Total tax receivable agreement obligations due to related parties	126,841
Less: Current portion due	(20,113)
Tax receivable agreement long-term obligations due to related parties	106,728
Tax Receivable Agreement 2017 [Member]
Related Party Transaction [Line Items]
Remainder of 2021
2022	2,281
2023	47,384
2024	26,551
2025	8,441
Thereafter	29,479
Gross expected payments	114,136
Less: Amounts representing discount	(57,713)
Total tax receivable agreement obligations due to related parties	56,423
Less: Current portion due	(2,281)
Tax receivable agreement long-term obligations due to related parties	$ 54,142