Quarterly report pursuant to Section 13 or 15(d)

RELATED PARTY TRANSACTIONS (Details)

v3.24.1.1.u2
RELATED PARTY TRANSACTIONS (Details)
 3 Months Ended
Jan. 31, 2024
USD ($)
$ / shares
shares
Oct. 30, 2020
component
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Related Party Transaction [Line Items]          
Services expenses     $ 5,028,000 $ 4,855,000  
Waiver of internal administrative services expenses     2,111,000 1,889,000  
Accounts payable and other liabilities     378,000   $ 255,000
Related Party | MSC Income | Advisory Agreement          
Related Party Transaction [Line Items]          
Base fee rate (as a percent)   1.75%      
Number of components related to incentive fee | component   2      
Related Party | MSC Income | Advisory Agreement, Incentive Rate, Pre-Incentive Fee Net Investment Income          
Related Party Transaction [Line Items]          
Incentive fee rate (as a percent)   20.00%      
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Quarterly Hurdle Rate          
Related Party Transaction [Line Items]          
Incentive fee rate (as a percent)   1.875%      
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Annualized Hurdle Rate          
Related Party Transaction [Line Items]          
Incentive fee rate (as a percent)   7.50%      
Related Party | MSC Income | Advisory Agreement, Incentive Rate, Pre-Incentive Fee Net Investment Income Below Catch-Up Threshold          
Related Party Transaction [Line Items]          
Incentive fee rate (as a percent)   100.00%      
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Quarterly Catch-Up Threshold          
Related Party Transaction [Line Items]          
Incentive fee rate (as a percent)   2.34375%      
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Annualized Catch-Up Threshold          
Related Party Transaction [Line Items]          
Incentive fee rate (as a percent)   9.375%      
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Exceeds Catch-Up Threshold          
Related Party Transaction [Line Items]          
Incentive fee rate (as a percent)   20.00%      
Related Party | MSC Income | Advisory Agreement - Base Management Fees          
Related Party Transaction [Line Items]          
Services expenses     5,000,000 4,900,000  
Related Party | MSC Income | Advisory Agreement - Subordinated Incentive Fees          
Related Party Transaction [Line Items]          
Services expenses     3,600,000 2,700,000  
Related Party | MSC Income | Advisory Agreement - Incentive Fees, Capital Gains Fees          
Related Party Transaction [Line Items]          
Services expenses     0 0  
Related Party | MSC Income | Advisory Agreement - Internal Administrative Services          
Related Party Transaction [Line Items]          
Services expenses     2,300,000 2,000,000  
Waiver of internal administrative services expenses     $ 2,100,000 1,900,000  
Related Party | MSC Income - HMS Adviser | Offering Costs          
Related Party Transaction [Line Items]          
Percentage of payment of offering costs (as a percent)     1.50%    
Accounts payable and other liabilities     $ 600,000    
Fee paid indirectly       $ 100,000  
Related Party | Main Street | Dividend Reinvestment Plan          
Related Party Transaction [Line Items]          
Sale of stock, number of shares (in shares) | shares 314,070        
Sale of stock, price per share (in dollars per share) | $ / shares $ 7.96        
Sale of stock, proceeds $ 2,500,000