v3.26.1
BORROWINGS - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 20, 2026
Mar. 20, 2025
Oct. 04, 2024
Oct. 03, 2024
Jun. 14, 2024
Mar. 14, 2024
Dec. 07, 2023
Jun. 23, 2023
May 20, 2022
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Jan. 22, 2025
Debt Instrument [Line Items]                              
Asset coverage ratio (as a percent)                   177.64% 179.67% 177.64% 179.67% 178.55%  
Amount available                   $ 278,500,000   $ 278,500,000   $ 259,000,000  
Interest and debt financing expenses                   16,565,000 $ 20,105,000 34,314,000 $ 40,748,000    
Total Commitment                   1,372,017,000   1,372,017,000   1,373,119,000  
CLO-I | Secured Debt                              
Debt Instrument [Line Items]                              
Amount available                   0   0   0  
Total Commitment                   320,767,000   320,767,000   321,083,000  
Debt securitization                 $ 448,325,000            
AAA Class A-1 2022 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization                 $ 199,000,000            
AAA Class A-1 2022 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)                 1.80%            
AAA Class A-1F 2022 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)                 4.42%            
Debt securitization                 $ 34,250,000            
AA Class B 2022 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization                 $ 47,250,000            
AA Class B 2022 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)                 2.30%            
A Class C 2022 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization                 $ 31,500,000            
A Class C 2022 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)                 3.15%            
BBB Class D 2022 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization                 $ 27,000,000            
BBB Class D 2022 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)                 4.15%            
Subordinated 2022 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization                 $ 79,325,000            
AAA Class A-L 2022 Loans to CLO-I | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization                 $ 30,000,000            
AAA Class A-L 2022 Loans to CLO-I | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)                 1.80%            
CLO-I Refinancing | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization   $ 457,975,000             $ 79,325,000            
AA Class X 2025 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization   $ 1,900,000                          
AA Class X 2025 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)   1.05%                          
AAA Class A-R 2025 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)   1.38%                          
Debt securitization   $ 233,250,000                          
AA Class B-R 2025 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization   $ 56,250,000                          
AA Class B-R 2025 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)   1.70%                          
Subordinated 2025 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization   $ 136,575,000                          
AAA Class A-L-R 2025 Loans to CLO-I | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization   $ 30,000,000                          
Class A-L-R 2025 Loans | Secured Debt                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)   1.38%                          
2026 Debt/ CLO-II | Secured Debt                              
Debt Instrument [Line Items]                              
Amount available                   0   0   0  
Total Commitment                   213,000,000   213,000,000   213,286,000  
Debt securitization             $ 298,060,000                
AAA Class X 2023 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization             $ 2,000,000                
AAA Class X 2023 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)             2.00%                
AAA Class A-1 2023 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization             $ 100,500,000                
AAA Class A-1 2023 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)             2.35%                
AA Class B 2023 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization             $ 37,500,000                
AA Class B 2023 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)             3.20%                
Subordinated 2023 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization             $ 83,060,000                
AAA Class A-L-A 2023 to CLO-II | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization             $ 25,000,000                
AAA Class A-L-A 2023 to CLO-II | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)             2.35%                
AAA Class A-L-B 2023 Loans to CLO-II | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization             $ 50,000,000                
AAA Class A-L-B 2023 Loans to CLO-II | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)             2.35%                
2026 Debt Securitization Refinancing | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization $ 299,700,000                            
AAA Class A-R 2026 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Interest rate (as a percent) 1.38%                            
Debt securitization $ 125,500,000                            
AA Class B-R 2026 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Interest rate (as a percent) 1.70%                            
Debt securitization $ 37,500,000                            
Subordinated 2026 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization $ 86,700,000           $ 83,060,000                
AAA Class A-L-R 2026 Loans to the 2026 Issuer | Secured Debt                              
Debt Instrument [Line Items]                              
Interest rate (as a percent) 1.38%                            
Debt securitization $ 50,000                            
2024 Debt/ CLO-III | Secured Debt                              
Debt Instrument [Line Items]                              
Amount available                   0   0   0  
Total Commitment                   213,250,000   213,250,000   213,750,000  
Debt securitization           $ 296,970,000                  
AAA Class X 2024 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization           $ 2,000,000.0                  
AAA Class X 2024 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)           1.40%                  
AAA Class A 2024 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization           $ 175,500,000                  
AAA Class A 2024 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)           2.00%                  
AA Class B 2024 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization           $ 37,500,000                  
AA Class B 2024 Notes | Secured Debt | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)           2.65%                  
Subordinated 2024 Notes | Secured Debt                              
Debt Instrument [Line Items]                              
Debt securitization           $ 81,970,000                  
2030 Notes                              
Debt Instrument [Line Items]                              
Total Commitment                             $ 300,000,000.0
Stated interest rate (as a percent)                             6.65%
Secured Debt | 2030 Notes | Credit Facility                              
Debt Instrument [Line Items]                              
Line of credit facility, unused capacity, commitment fee percentage, less than forty percent of total commitments (as a percent)         0.50%                    
Line of credit facility, maximum borrowing capacity (as a percent)         40.00%                    
Line of credit facility, unused capacity, commitment fee percentage, in excess of forty percent of total commitments (as a percent)         1.50%                    
Interest and debt financing expenses                   0 0 0 1,185,000    
Secured Debt | Wells Fargo Financing Facility - Daily Undrawn Amounts During the Period | Credit Facility                              
Debt Instrument [Line Items]                              
Amount available                   225,000,000   225,000,000      
Unused commitment fee (as a percent)         0.25%                    
Secured Debt | Wells Fargo Financing Facility - for Next Six Months and Thereafter | Credit Facility                              
Debt Instrument [Line Items]                              
Unused commitment fee (as a percent)         0.50%                    
Secured Debt | Revolving Credit Facility | Credit Facility                              
Debt Instrument [Line Items]                              
Amount available                   278,500,000   278,500,000   259,000,000  
Unused commitment fee (as a percent)               0.375%              
Interest and debt financing expenses                   1,451,000 2,568,000 2,983,000 4,953,000    
Total Commitment     $ 325,000,000 $ 250,000,000.0           325,000,000   $ 325,000,000   $ 325,000,000  
Interest rate (as a percent)     2.00% 2.125%                      
Secured Debt | Revolving Credit Facility | Credit Facility | Three Month SOFR                              
Debt Instrument [Line Items]                              
Credit spread adjustment (as a percent)     0.10% 0.15%                      
Secured Debt | Revolving Credit Facility | Credit Facility | Six Month SOFR                              
Debt Instrument [Line Items]                              
Credit spread adjustment (as a percent)     0.10% 0.25%                      
Secured Debt | Revolving Credit Facility | Credit Facility | All Other Borrowing Rates                              
Debt Instrument [Line Items]                              
Credit spread adjustment (as a percent)     1.00% 1.125%                      
Secured Debt | Revolving Credit Facility | Credit Facility | Secured Overnight Financing Rate (SOFR)                              
Debt Instrument [Line Items]                              
Interest rate (as a percent)                       2.00%   2.00%  
Secured Debt | CLO-I | Credit Facility                              
Debt Instrument [Line Items]                              
Interest and debt financing expenses                   4,226,000 4,835,000 $ 8,440,000 10,669,000    
Secured Debt | 2026 Debt/ CLO-II | Credit Facility                              
Debt Instrument [Line Items]                              
Interest and debt financing expenses                   2,823,000 3,767,000 6,769,000 7,513,000    
Secured Debt | 2024 Debt/ CLO-III | Credit Facility                              
Debt Instrument [Line Items]                              
Interest and debt financing expenses                   3,219,000 3,558,000 6,430,000 7,130,000    
Secured Debt | 2030 Notes | Credit Facility                              
Debt Instrument [Line Items]                              
Amount available                   0   0   $ 0  
Interest and debt financing expenses                   4,846,000 $ 5,377,000 9,692,000 $ 9,298,000    
Total Commitment                   $ 300,000,000   $ 300,000,000   $ 300,000,000  
Bridge Loan | Revolving Credit Facility | Credit Facility                              
Debt Instrument [Line Items]                              
Total Commitment               $ 25,000,000.0