Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS - Revolving Line of Credit Narrative (Details)

v3.23.3
BORROWINGS - Revolving Line of Credit Narrative (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Apr. 10, 2023
Mar. 08, 2021
Sep. 30, 2023
Mar. 31, 2023
Debt Instrument [Line Items]        
Indebtedness asset coverage on our senior securities     211.50% 244.70%
Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Unused fee percentage       1.00%
Credit Facility        
Debt Instrument [Line Items]        
Term   2 years    
Credit Facility | Line of Credit        
Debt Instrument [Line Items]        
Unused fee percentage     0.75%  
Credit Facility | Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Covenant, required minimum net worth of mandatory redeemable term preferred stock     $ 210.0  
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     $ 328.5  
Indebtedness asset coverage on our senior securities     211.50%  
Senior security, indebtedness, asset coverage amount     $ 805.9  
Credit Facility | Line of Credit | Revolving Line of Credit | Minimum        
Debt Instrument [Line Items]        
Indebtedness asset coverage on our senior securities     150.00%  
Credit Facility | Line of Credit | Revolving Line of Credit | Less than or Equal to 50% of Commitment        
Debt Instrument [Line Items]        
Unused fee percentage     0.50%  
Credit Facility | Line of Credit | Revolving Line of Credit | Greater Than 50% But Less Than or Equal to 65% of Commitment        
Debt Instrument [Line Items]        
Unused fee percentage     0.75%  
Credit Facility | Line of Credit | Revolving Line of Credit | Greater Than 65% Of Commitment        
Debt Instrument [Line Items]        
Unused fee percentage     1.00%  
Credit Facility | Secured Overnight Financing Rate (SOFR) | Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate 0.11%   3.25%  
Debt instrument, variable rate floor     0.35% 0.50%
Credit Facility | SOFR, Tranche One | Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     2.85%  
Credit Facility | SOFR, Tranche Two | Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     3.10%  
Credit Facility | SOFR, Thereafter | Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     3.35%  
Credit Facility | SOFR, Thereafter, Adjustment | Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     0.11%  
Credit Facility | LIBOR | Line of Credit | Revolving Line of Credit        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate       2.94%