INCOME TAXES - Schedule of Cost of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Gross unrealized appreciation	$ 38,155	$ 19,066	$ 6,529
Gross unrealized depreciation	(59,527)	(52,242)	(72,587)
Net unrealized appreciation (depreciation)	(21,372)	(33,176)	(66,058)
Tax cost of investments at year end	$ 3,813,066	$ 3,226,720	$ 2,939,635