Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2024
Related Party Transaction [Line Items]
Revenues	$ 149,999	$ 126,876	$ 346,730	$ 251,914
Fees receivable	95,509		95,509		$ 108,291
General Partnerships
Related Party Transaction [Line Items]
Fees receivable	75,577		75,577		$ 91,317
Management and advisory fees
Related Party Transaction [Line Items]
Revenues	119,783	109,184	259,745	214,592
Management and advisory fees | General Partnerships
Related Party Transaction [Line Items]
Revenues	94,170	83,717	209,218	164,020
Incentive fees
Related Party Transaction [Line Items]
Revenues	30,216	17,692	86,985	37,322
Incentive fees | General Partnerships
Related Party Transaction [Line Items]
Revenues	$ 29,056	$ 16,602	$ 84,376	$ 35,227