Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2025		Sep. 30, 2024
Investment, cost	$ 3,075,122		$ 3,144,919
Unamortized financing costs	$ 6,561		$ 4,935
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common stock, shares authorized (in shares)	250,000		250,000
Common stock, shares issued (in shares)	88,086		82,245
Common stock, shares outstanding (in shares)	88,086		82,245
Net asset value per common share (in dollars per share)	$ 16.64		$ 18.09
Control investments
Investment, cost	$ 377,709	[1],[2]	$ 372,901	[3],[4]
Affiliate investments
Investment, cost	58,344		38,175
Non-control/Non-affiliate investments
Investment, cost	$ 2,639,069	[5]	$ 2,733,843	[6]

[1] As defined in the Investment Company Act, the Company is deemed to be both an "Affiliated Person" of and to "Control" these portfolio companies as the Company owns more than 25% of the portfolio company's outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement). See Schedule 12-14 in the accompanying notes to the Consolidated Financial Statements for transactions during the year ended September 30, 2025 in which the issuer was both an Affiliated Person and a portfolio company that the Company is deemed to control.

[2] Control Investments generally are defined by the Investment Company Act of 1940, as amended (the "Investment Company Act"), as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.

[3] As defined in the Investment Company Act, the Company is deemed to be both an "Affiliated Person" of and to "Control" these portfolio companies as the Company owns more than 25% of the portfolio company's outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement). See Schedule 12-14 in the accompanying notes to the Consolidated Financial Statements for transactions during the year ended September 30, 2024 in which the issuer was both an Affiliated Person and a portfolio company that the Company is deemed to control.

[4] Control Investments generally are defined by the Investment Company Act, as investments in companies in which the Company owns more than 25% of the voting securities or maintains greater than 50% of the board representation.

[5] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments.

[6] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments.