Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS - Revolving Credit Facility Narrative (Details)

v3.23.1
BORROWINGS - Revolving Credit Facility Narrative (Details) - Credit Facility - Line of Credit
 6 Months Ended 12 Months Ended
Sep. 12, 2022
May 13, 2022
USD ($)
Mar. 31, 2023
USD ($)
obligor
Sep. 30, 2022
USD ($)
Oct. 31, 2022
USD ($)
Oct. 30, 2022
USD ($)
Sep. 20, 2022
USD ($)
Sep. 19, 2022
USD ($)
May 12, 2022
USD ($)
Revolving Line of Credit                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity   $ 175,000,000 $ 245,000,000 $ 225,000,000         $ 205,000,000
Unused fee percentage   0.35% 0.75% 0.50%          
Average unused fee percentage   35.00%              
Debt instrument, fee   $ 1,100,000              
Covenant, required minimum net worth of mandatory redeemable term preferred stock     $ 325,000,000            
Covenant, required minimum net worth of mandatory redeemable term preferred stock, plus percent of all equity and subordinated debt raised     50.00%            
Covenant, required minimum net worth of mandatory redeemable term preferred stock, minus percent of any equity or subordinated debt redeemed or retired     50.00%            
Covenant, required minimum net worth of mandatory redeemable term preferred stock, plus percent of all equity and subordinated debt raised, minus percent of any equity or subordinated debt redeemed or retired     $ 349,100,000            
Senior security, indebtedness, asset coverage amount     $ 539,100,000            
Indebtedness asset coverage on our senior securities     195.50%            
Investment company, number of obligor | obligor     34            
Revolving Line of Credit | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument, variable rate floor   0.35%              
Revolving Line of Credit | LIBOR, Tranche One                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate   2.70%              
Revolving Line of Credit | LIBOR, Thereafter                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate   3.25%              
Revolving Line of Credit | SOFR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate     3.00% 2.81%          
Revolving Line of Credit - Amendment No. 1 | SOFR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate 0.11%                
Revolving Line of Credit - Amendment No. 2                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity             $ 225,000,000 $ 175,000,000  
Line of credit facility, increase in borrowing capacity             $ 50,000,000    
Revolving Line of Credit - Amendment No. 3                  
Debt Instrument [Line Items]                  
Line of credit facility, maximum borrowing capacity         $ 245,000,000 $ 225,000,000      
Line of credit facility, increase in borrowing capacity         $ 20,000,000