CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Investment cost	$ 2,538,142	$ 2,607,174
Foreign currencies, cost	$ 28,563	$ 2,404
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	65,451,359
Common stock, shares outstanding	65,253,275	65,451,359
Non-controlled/Non-affiliated Investments
Investment cost	$ 2,012,273	$ 2,019,573
Non-controlled/Affiliated Investments
Investment cost	130,648	121,307
Controlled Investments
Investment cost	$ 395,221	$ 466,294