Variable Interest Entities - Unconsolidated VIEs (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Variable Interest Entity [Line Items]
Remaining unfunded commitments from the limited partners and general partners to the unconsolidated VIE	$ 142,665
Statement of Financial Position [Abstract]
Investments	546,080	$ 530,921
Fees receivable	65,864	47,140
Due from related parties	7,963	7,186
Total assets	1,200,094	1,140,543
Not Primary Beneficiary
Statement of Financial Position [Abstract]
Investments	204,504	199,858
Fees receivable	23,986	15,829
Due from related parties	3,344	1,960
Total assets	231,834	217,647
Less: Non-controlling interests	(1,570)	(1,665)
Maximum exposure to loss	$ 230,264	$ 215,982