Organization - Additional Information (Details) $ / shares in Units, $ in Thousands, shares in Millions					3 Months Ended	254 Months Ended
	Jul. 22, 2024 USD ($)	Aug. 02, 2022 USD ($) $ / shares	Oct. 30, 2018	Apr. 08, 2004 USD ($) $ / shares shares	Mar. 31, 2025 USD ($)	Mar. 31, 2025 USD ($)
Organization [Line Items]
Operations commenced date				Apr. 08, 2004
Proceeds from initial public offering				$ 870,000
Common stock shares issued | shares				62.0
Common stock issued, price per share | $ / shares		$ 15.52		$ 15
Stock issued, reverse stock splits | shares				20.7
Shares Issued Price Per Share Adjusted for Reverse Stock Splits | $ / shares				$ 45
Reverse stock split, conversion ratio			0.33
Net proceeds from additional offerings of common stock		$ 30,000				$ 2,240,067
Repurchased common stock value					$ 6,079	$ 254,186
AFT and AIF First Merger
Organization [Line Items]
Net proceeds from additional offerings of common stock	$ 440,140
Maximum
Organization [Line Items]
Middle market investment companies EBIDTA					$ 75,000