Related-Party Transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Related Party Transaction [Line Items]
Revenues	$ 91,704	$ 84,583	$ 267,019	$ 238,758
Fees receivable	47,085		47,085		$ 29,202
Payable to related parties pursuant to tax receivable agreement	187,252		187,252		194,764
General Partnerships
Related Party Transaction [Line Items]
Fees receivable	31,407		31,407		14,814
Joint Venture
Related Party Transaction [Line Items]
Payable to related parties pursuant to tax receivable agreement	370		370		$ 325
Service Agreement Fees Paid | Joint Venture
Related Party Transaction [Line Items]
Fees paid to joint venture	1,098	1,047	3,201	3,001
Management and advisory fees
Related Party Transaction [Line Items]
Revenues	79,836	75,279	229,653	208,913
Management and advisory fees | General Partnerships
Related Party Transaction [Line Items]
Revenues	53,701	52,080	150,955	140,883
Incentive fees
Related Party Transaction [Line Items]
Revenues	11,868	9,304	37,366	29,845
Incentive fees | General Partnerships
Related Party Transaction [Line Items]
Revenues	$ 10,335	$ 8,153	$ 34,669	$ 28,332