CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Investment cost	$ 2,552,527	$ 2,538,142
Foreign currencies, cost	$ 30	$ 28,563
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	130,000,000	130,000,000
Common stock, shares issued	65,253,275	65,253,275
Common stock, shares outstanding	65,253,275	65,253,275
Non-controlled/Non-affiliated Investments
Investment cost	$ 2,008,281	$ 2,012,273
Non-controlled/Affiliated Investments
Investment cost	150,771	130,648
Controlled Investments
Investment cost	$ 393,475	$ 395,221