Investments - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Mar. 31, 2022
Schedule of Investments [Line Items]
Purchases of investments on trade date basis		$ 499,632	$ 417,124	$ 1,140,849
Sales and Repayment of Investments on Trade Date Basis		586,557	504,346	1,074,927
Paid in kind income earned	$ 2,222	2,662	$ 3,006	4,075
Dividend income	$ 1,397	$ 779
Percentage on investments on non-accrual at amortized cost	1.20%	1.90%	1.20%
Percentage on investments on non-accrual at fair value	0.20%	0.40%	0.20%
Non-controlled/Affiliated Investments
Schedule of Investments [Line Items]
Paid in kind income earned		$ 58	$ 125	71
Dividend income		$ 718	$ 1,010	$ 1,290
Investment, Type [Extensible Enumeration]	Structured Products [Member]	Structured Products [Member]	Structured Products [Member]	Structured Products [Member]