Quarterly report pursuant to Section 13 or 15(d)

RELATED PARTY TRANSACTIONS (Details)

v3.23.3
RELATED PARTY TRANSACTIONS (Details)
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 01, 2023
USD ($)
$ / shares
shares
May 01, 2023
USD ($)
$ / shares
shares
May 02, 2022
USD ($)
$ / shares
shares
Oct. 30, 2020
Sep. 30, 2023
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
$ / shares
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
$ / shares
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Oct. 30, 2021
component
Related Party Transaction [Line Items]                      
Services expenses           $ 4,994,000 $ 4,974,000 $ 14,761,000 $ 14,919,000    
Waiver of internal administrative services expenses           2,014,000 1,252,000 6,297,000 3,431,000    
Accounts payable and other liabilities         $ 740,000 740,000   740,000   $ 1,292,000  
Related Party | MSC Income | Advisory Agreement                      
Related Party Transaction [Line Items]                      
Base fee rate       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       20.00%              
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Quarterly Hurdle Rate                      
Related Party Transaction [Line Items]                      
Incentive fee rate       1.875%              
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Annualized Hurdle Rate                      
Related Party Transaction [Line Items]                      
Incentive fee rate       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       100.00%              
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Quarterly Catch-Up Threshold                      
Related Party Transaction [Line Items]                      
Incentive fee rate       2.34375%              
Related Party | MSC Income | Advisory Agreement - Incentive Rate, Annualized Catch-Up Threshold                      
Related Party Transaction [Line Items]                      
Incentive fee rate       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       20.00%              
Related Party | MSC Income | Advisory Agreement - Base Management Fees                      
Related Party Transaction [Line Items]                      
Services expenses           5,000,000 5,000,000 14,800,000 14,900,000    
Related Party | MSC Income | Advisory Agreement - Subordinated Incentive Fees                      
Related Party Transaction [Line Items]                      
Services expenses           2,600,000 0 8,900,000 0    
Related Party | MSC Income | Advisory Agreement - Incentive Fees, Capital Gains Fees                      
Related Party Transaction [Line Items]                      
Services expenses           0 0 0 0    
Related Party | MSC Income | Advisory Agreement - Internal Administrative Services                      
Related Party Transaction [Line Items]                      
Services expenses           2,200,000 1,400,000 6,800,000 3,900,000    
Waiver of internal administrative services expenses           2,000,000 1,300,000 $ 6,300,000 3,400,000    
Related Party | MSC Income - HMS Adviser | Offering Costs                      
Related Party Transaction [Line Items]                      
Percentage of payment of offering costs               1.50%      
Accounts payable and other liabilities         $ 600,000 $ 600,000   $ 600,000      
Fee paid indirectly             $ 80,000.00 $ 130,000 $ 210,000    
Related Party | Main Street | Dividend Reinvestment Plan                      
Related Party Transaction [Line Items]                      
Sale of stock, number of shares (in shares) | shares 348,542 255,754 94,697                
Sale of stock, price per share (in dollars per share) | $ / shares $ 7.89 $ 7.82 $ 7.92                
Sale of stock, proceeds $ 2,800,000 $ 2,000,000 $ 750,000                
Related Party | Main Street | Dutch Auction Tender Offer                      
Related Party Transaction [Line Items]                      
Sale of stock, number of shares (in shares) | shares         115,385            
Sale of stock, price per share (in dollars per share) | $ / shares         $ 6.50 $ 6.50   $ 6.50      
Sale of stock, proceeds         $ 800,000