Variable Interest Entities - Unconsolidated VIEs (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Mar. 31, 2022
Variable Interest Entity [Line Items]
Remaining unfunded commitments from the limited partners and general partners to the unconsolidated VIE	$ 140,691
Statement of Financial Position [Abstract]
Investments	514,332	$ 503,789
Fees receivable	52,074	51,869
Due from related parties	7,784	1,872
Total assets	1,124,361	1,294,946
Not Primary Beneficiary
Statement of Financial Position [Abstract]
Investments	190,735	191,378
Fees receivable	16,418	9,754
Due from related parties	1,901	778
Total assets	209,054	201,910
Less: Non-controlling interests	(1,534)	(1,873)
Maximum exposure to loss	$ 207,520	$ 200,037