STATEMENTS OF CHANGES IN NET ASSETS - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2022	Mar. 31, 2022	Mar. 31, 2021
Operations
Net investment income	$ 74,143	$ 95,961	$ 110,026
Net realized gains (losses)	(69,239)	(67,367)	(21,506)
Net change in unrealized gains (losses)	18,036	53,770	23,341
Net Increase (Decrease) in Net Assets Resulting from Operations	22,940	82,364	111,861
Distributions to Shareholders
Distribution of net investment income	(68,028)	(92,762)	(99,846)
Net Decrease in Net Assets Resulting from Distributions to Shareholders	(68,028)	(92,762)	(99,846)
Capital Share Transactions
Net proceeds from the issuance of common stock	30,000
Repurchase of common stock	(1,638)	(21,100)
Net Increase (Decrease) in Net Assets Resulting from Capital Share Transactions	28,362	(21,100)
Net Assets
Net increase (decrease) in net assets during the period	(16,726)	(31,498)	12,015
Net assets at beginning of period	1,004,832	1,036,330	1,024,315
Balance at End of Period	$ 988,106	$ 1,004,832	$ 1,036,330
Capital Share Activity
Shares issued during the period	1,932,641
Shares repurchased during the period	(128,522)	(1,611,936)
Shares issued at beginning of period	63,647,240	65,259,176	65,259,176
Common Stock, Shares, Outstanding, Beginning Balance	63,647,240	65,259,176	65,259,176
Shares Issued at End of Period	65,451,359	63,647,240	65,259,176
Common Stock, Shares, Outstanding, Ending Balance	65,451,359	63,647,240	65,259,176