Consolidated Statements of Assets and Liabilities - Parenthetical 1 - USD ($) $ in Thousands	Dec. 31, 2025		Sep. 30, 2025
Statement of Financial Position [Abstract]
Investment, cost	$ 7,429,166	[1]	$ 6,863,940	[2]
Unamortized Financing Costs	$ 10,585		$ 11,306
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common stock, shares issued (in shares)	203,377,000		196,721,000
Common stock, shares outstanding (in shares)	203,377,000		196,721,000
Net asset value per common share (in dollars per share)	$ 22.93		$ 23.09

[1] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments. 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 and/or has the power to exercise control over the management or policies of the company. Affiliate Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns between 5% and 25% of the voting securities.

[2] Non-Control/Non-Affiliate Investments are investments that are neither Control Investments nor Affiliate Investments. 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 and/or has the power to exercise control over the management or policies of the company. Affiliate Investments generally are defined by the Investment Company Act as investments in companies in which the Company owns between 5% and 25% of the voting securities.