Significant Accounting Policies (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 03, 2020	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Accounting Policies [Abstract]
Qualifying assets		81.08%		81.08%		80.64%
Total assets at fair value are in non-accrual status		0.20%		0.20%
Dividend income		$ 1,928	$ 5,306	$ 7,046	$ 12,277
Return of capital distributions		$ 0	$ 28,208	$ 4,760	$ 28,208
5.50% Preferred Stock
Temporary Equity [Line Items]
Dividend rate	5.50%			5.50%		5.50%
5.35% Series A Preferred Stock
Temporary Equity [Line Items]
Dividend rate				5.35%	5.35%