Investments - Summary of Investments by Geographic Composition Based on Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2026		Dec. 31, 2025
Schedule of Investments [Line Items]
Fair Value	$ 1,694,770	[1],[2]	$ 1,488,856	[3],[4],[5]
% Fair Value	100.00%		100.00%
United States
Schedule of Investments [Line Items]
Fair Value	$ 1,563,816		$ 1,362,534
% Fair Value	92.30%		91.50%
United Kingdom
Schedule of Investments [Line Items]
Fair Value	$ 79,679		$ 73,509
% Fair Value	4.70%		4.90%
Canada
Schedule of Investments [Line Items]
Fair Value	$ 25,551		$ 26,064
% Fair Value	1.50%		1.80%
Panama
Schedule of Investments [Line Items]
Fair Value	$ 9,178		$ 9,975
% Fair Value	0.50%		0.70%
Australia
Schedule of Investments [Line Items]
Fair Value	$ 8,827		$ 8,933
% Fair Value	0.50%		0.60%
Netherlands
Schedule of Investments [Line Items]
Fair Value	$ 7,719		$ 7,841
% Fair Value	0.50%		0.50%

[1] $ in thousands. Unless otherwise indicated, these investments were valued using unobservable inputs and are considered Level 3 investments. Refer to Note. 5 Fair Value Measurements.

[2] Negative fair market values indicate investment had an unfunded loan commitment, and no interest is being earned on the unfunded portion, although the investment may earn unused commitment fees. Unamortized fees are classified as unearned income which reduces cost basis, which may result in a negative cost basis. A negative fair value may result from the unfunded commitment being valued below par.

[3] $ in thousands. Unless otherwise indicated, these investments were valued using unobservable inputs and are considered Level 3 investments. Refer to Note. 5 Fair Value Measurements.

[4] Negative fair values indicate investment had an unfunded loan commitment, and no interest is being earned on the unfunded portion, although the investment may earn unused commitment fees. Unamortized fees are classified as unearned income which reduces cost basis, which may result in a negative cost basis. A negative fair value may result from the unfunded commitment being valued below par.

[5] The total par amount is presented for debt investments and the number of shares or units owned is presented for equity investments.