v3.26.1
INCOME TAXES - Schedule of Net Assets Resulting from Operations to Estimated RIC Taxable Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Income Tax Disclosure [Abstract]                      
Net increase in net assets from operations $ 27,479 $ 32,896 $ 25,619 $ 27,001 $ 17,561 $ 16,268 $ 22,684 $ 14,035 $ 112,995 $ 70,548 $ 83,389
Net unrealized depreciation (appreciation) on investments                 25,832 (2,423)  
Expense/loss recognized for tax on pass-through entities                 0 (80)  
Realized (gain) loss book/tax differences                 (4,775) (10,876)  
Capital loss carryover                 29,255 70,883  
Net operating income - wholly-owned subsidiary                 (40,127) (14,568)  
Dividend income from wholly-owned subsidiary                 33,223 9,038  
Non-deductible tax expense                 2,622 1,424  
Loss on extinguishment of debt                 (4,089) (2,726)  
Non-deductible compensation                 5,137 6,693  
Compensation related book/tax differences                 2,227 (2,741)  
Interest on non-accrual loans                 6,626 11,999  
Other book/tax differences                 103 (187)  
Estimated distributable income before deductions for distributions                 169,029 136,984  
Ordinary                 145,564 123,569  
Estimated annual RIC undistributed taxable income                 23,465 $ 13,415  
Capital loss carryover $ 160,100               $ 160,100