CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS AND TEMPORARY EQUITY - USD ($) $ in Thousands		Total	Conversion Of Convertible Preferred Stock	Conversion of Convertible Debt	Preferred Stock	Common Stock		Common Stock Conversion Of Convertible Preferred Stock	Common Stock Conversion of Convertible Debt	Paid-in capital in excess of par		Paid-in capital in excess of par Conversion Of Convertible Preferred Stock	[2]	Paid-in capital in excess of par Conversion of Convertible Debt	[2]	Distributable earnings (loss)
Beginning balance, Preferred Stock Classified as Temporary Equity (in shares) at Jun. 30, 2021		0
Beginning balance, temporary equity at Jun. 30, 2021		$ 0
Capital Transactions
Issuance of preferred stock (in shares)		8,805,451
Issuance of preferred stock		$ 220,136
Shares issued through reinvestment of dividends (in shares)		1,642
Shares issued through reinvestment of dividends		$ 41
Conversion of preferred stock to common stock (in shares)		(2,150)
Conversion of preferred stock to common stock		$ (54)
Reclassification of preferred stock to temporary equity (in shares)	[1]	5,796,528
Reclassification of preferred stock to temporary equity	[1]	$ 144,914
Total increase (decrease) (in shares)		14,601,471
Total increase (decrease)		$ 365,037
Ending balance, Preferred Stock Classified as Temporary Equity (in shares) at Sep. 30, 2021	[2]	14,601,471
Ending balance, temporary equity at Sep. 30, 2021	[2]	$ 365,037
Beginning balance, Common stock, shares outstanding (in shares) at Jun. 30, 2021		388,419,573				388,419,573
Beginning of period, Net Assets at Jun. 30, 2021		$ 3,945,517			$ 137,040	$ 388				$ 4,018,659	[2]					$ (210,570)	[2]
Net Decrease in Net Assets Resulting from Operations:
Net investment income		81,369														81,369	[2]
Net realized losses		(5,958)														(5,958)	[2]
Net change in unrealized (losses) gains		136,720														136,720	[2]
Distributions to Shareholders
Distributions from earnings	[2]	(68,755)														(68,755)
Return of capital to common stockholders (Note 12)	[2]	(3,695)								(3,695)
Capital Transactions
Issuance of preferred stock		(5,373)			7,866					(13,239)	[2]
Shares issued through reinvestment of dividends		$ 8,298			8	$ 2				8,288	[2]
Shares issued through reinvestment of dividends (in shares)		1,955				1,079,168
Conversion of preferred stock to common stock (in shares)		2,150						5,972
Conversion of preferred stock to common stock			$ 54									$ 54
Reclassification of preferred stock issuance costs to temporary equity	[1]	$ (144,914)			(144,914)
Total (decrease) increase during period (in shares)						1,085,140
Total (decrease) increase during period		$ (2,254)			(137,040)	$ 2				(8,592)	[2]					143,376	[2]
Ending balance, Common stock, shares outstanding (in shares) at Sep. 30, 2021		389,504,713				389,504,713	[2]
End of period, Net Assets at Sep. 30, 2021	[2]	$ 3,943,263			0	$ 390				4,010,067						(67,194)
Beginning balance, Preferred Stock Classified as Temporary Equity (in shares) at Jun. 30, 2021		0
Beginning balance, temporary equity at Jun. 30, 2021		$ 0
Ending balance, Preferred Stock Classified as Temporary Equity (in shares) at Jun. 30, 2022	[2]	29,607,882
Ending balance, temporary equity at Jun. 30, 2022	[2]	$ 692,076
Beginning balance, Common stock, shares outstanding (in shares) at Jun. 30, 2021		388,419,573				388,419,573
Beginning of period, Net Assets at Jun. 30, 2021		$ 3,945,517			$ 137,040	$ 388				4,018,659	[2]					(210,570)	[2]
Ending balance, Common stock, shares outstanding (in shares) at Jun. 30, 2022		393,164,437				393,164,437	[2]
End of period, Net Assets at Jun. 30, 2022	[2]	$ 4,119,123				$ 393				4,050,370						68,360
Capital Transactions
Issuance of preferred stock (in shares)		11,521,659
Issuance of preferred stock		$ 257,272
Shares issued through reinvestment of dividends (in shares)		9,395
Shares issued through reinvestment of dividends		$ 234
Conversion of preferred stock to common stock (in shares)		(274,644)
Conversion of preferred stock to common stock		$ (6,324)
Total increase (decrease) (in shares)		11,256,410
Total increase (decrease)		$ 251,182
Ending balance, Preferred Stock Classified as Temporary Equity (in shares) at Sep. 30, 2022		40,864,292
Ending balance, temporary equity at Sep. 30, 2022		$ 943,258
Net Decrease in Net Assets Resulting from Operations:
Net investment income		99,266														99,266	[2]
Net realized losses		(23,205)														(23,205)	[2]
Net change in unrealized (losses) gains		(168,500)														(168,500)	[2]
Distributions to Shareholders
Distributions from earnings	[2]	(83,832)														(83,832)
Capital Transactions
Shares issued through reinvestment of dividends		15,243				$ 2				15,241	[2]
Shares issued through reinvestment of dividends (in shares)						2,154,958
Conversion of preferred stock to common stock (in shares)								859,358	300
Conversion of preferred stock to common stock			$ 6,324	$ 3				$ 1				$ 6,323		$ 3
Total (decrease) increase during period (in shares)						3,014,616
Total (decrease) increase during period		$ (154,701)				$ 3				21,567	[2]					(176,271)	[2]
Ending balance, Common stock, shares outstanding (in shares) at Sep. 30, 2022		396,179,053				396,179,053
End of period, Net Assets at Sep. 30, 2022		$ 3,964,422				$ 396				$ 4,071,937	[2]					$ (107,911)	[2]

[1] Preferred Stock issued prior to our 5.35% Series A Preferred Stock issuance transferred to temporary equity. Refer to Note 9 within the accompanying notes to the consolidated financial statements for further discussio

[2] Certain reclassifications have been made in the presentation of prior year amounts since initial disclosure in our Quarterly Report on Form 10-Q for the period ended September 30, 2021 to conform to the presentation in our Annual Report on Form 10-K for the year ended June 30, 2022. In addition, we have not yet finalized return of capital estimates for the current period. See Note 2 and Note 12 within the accompanying notes to consolidated financial statements for further discussion.