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Commitments and Contingencies (Details) $ in Millions		3 Months Ended		9 Months Ended
	Dec. 16, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2023 USD ($)	Jan. 30, 2023 USD ($)	Oct. 03, 2022 USD ($)	Feb. 18, 2022 advisor cause
Other Commitments [Line Items]
Rental expense		$ 1.6	$ 1.6	$ 4.9	$ 5.0
Potential gross capital commitments		49.4		49.4		$ 61.1
Capital funding commitment reserves		$ 0.1		$ 0.1
Portfolio percentage of unfunded commitment		90.00%		90.00%
Bayati Action
Other Commitments [Line Items]
Complaint filing period				20 days
Paul Capital Advisors Lawsuit
Other Commitments [Line Items]
Number of trust advisors | advisor									2
Number of new causes of action | cause									6
Maximum potential negative impact								$ 350.0
Private Arbitration
Other Commitments [Line Items]
Damages sought	$ 36.3
Chapter 11 Cases | Minimum
Other Commitments [Line Items]
Maximum potential negative impact							$ 155.0
Chapter 11 Cases | Maximum
Other Commitments [Line Items]
Maximum potential negative impact							382.0
Official Committee of Bondholders Motion
Other Commitments [Line Items]
Maximum potential negative impact							$ 500.0

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