Annual report [Section 13 and 15(d), not S-K Item 405]

RELATED PARTY TRANSACTIONS - Schedule of Management and Incentive Fee (Details)

v3.25.4
RELATED PARTY TRANSACTIONS - Schedule of Management and Incentive Fee (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Related Party Transaction [Line Items]      
Management fee expense $ 19,757 $ 20,922 $ 19,828
Internal administrative expenses waived 0 (9,450) (8,308)
Related Party | MSC Income      
Related Party Transaction [Line Items]      
Incentive fee waived 200    
Related Party | Advisory Agreement - Base Management Fees | MSC Income      
Related Party Transaction [Line Items]      
Management fee expense 19,757 20,922 19,828
Related Party | Advisory Agreement - Subordinated Incentive Fees | MSC Income      
Related Party Transaction [Line Items]      
Management fee expense 12,145 12,494 12,569
Incentive fee waived 12,300    
Related Party | Advisory Agreement - Incentive Fees, Capital Gains Fees | MSC Income      
Related Party Transaction [Line Items]      
Management fee expense 2,763 0 0
Related Party | Advisory Agreement - Internal Administrative Services | MSC Income      
Related Party Transaction [Line Items]      
Management fee expense 701 10,089 8,916
Internal administrative expenses waived $ 0 $ (9,450) $ (8,308)