Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Related Party Transaction [Line Items]
Revenues	$ 126,876	$ 153,382	$ 251,914	$ 288,891
Fees receivable	61,800		61,800		$ 47,140
General Partnerships
Related Party Transaction [Line Items]
Fees receivable	43,503		43,503		$ 31,684
Management and advisory fees
Related Party Transaction [Line Items]
Revenues	109,184	92,880	214,592	178,826
Management and advisory fees | General Partnerships
Related Party Transaction [Line Items]
Revenues	83,717	67,334	164,020	128,044
Incentive fees
Related Party Transaction [Line Items]
Revenues	17,692	60,502	37,322	110,065
Incentive fees | General Partnerships
Related Party Transaction [Line Items]
Revenues	$ 16,602	$ 59,714	$ 35,227	$ 108,893