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Supplemental Cash Flow - Schedule of Supplemental Cash Flow Disclosures (Details) - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Mar. 31, 2023
Supplemental Cash Flow Information [Abstract]      
Establishment of lease liability in exchange for right of use asset $ 5,455 $ 5,401  
Deconsolidation of net liabilities held by deconsolidated fund 6,095 0  
Non-cash investing activities:      
Deconsolidation of investments held by deconsolidated fund 103,990 0  
Transfer of equity method investment in Partnerships from deconsolidated fund 32,018 0  
Establishment of receivable for intangible assets sold 0 6,776  
Non-cash purchase of other equity method investment 2,000 0  
Non-cash financing activities:      
Dividends declared but not paid 16,793 14,810 $ 15,049
Member distributions declared but not paid $ 21,216 $ 19,161