Investments - Summary of Change in Capitalized PIK balance (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Mar. 31, 2022
Schedule of Investments [Abstract]
PIK balance at beginning of period	$ 39,227	$ 21,533	$ 41,947
PIK income capitalized	2,154	2,971	4,318
Adjustments due to investments exited or written off	(19,848)	(19)	(7,038)
PIK balance at end of period	$ 21,533	$ 24,485	$ 39,227