v3.25.4
Debt - Additional Information (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2027
Feb. 23, 2026
Nov. 24, 2025
Oct. 17, 2025
Jun. 12, 2025
May 06, 2025
Jan. 31, 2025
Oct. 31, 2024
Oct. 30, 2024
Oct. 24, 2024
Aug. 09, 2024
Apr. 29, 2024
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jan. 29, 2026
Dec. 16, 2025
Sep. 28, 2023
Line of Credit Facility [Line Items]                                        
Aggregate borrowing amount committed                         $ 8,535,000 $ 8,535,000 $ 8,535,000 $ 4,155,000        
Deferred financing costs                         36,924 36,924 36,924 29,448        
Short-term borrowings outstanding                         $ 0 $ 0 $ 0 $ 0        
Debt                                        
Line of Credit Facility [Line Items]                                        
Weighted average interest rates                             6.00% 6.92%        
Average outstanding balance                             $ 3,368,655 $ 1,061,820        
Asset Coverage Ratio Requirement Description                             Investment Company Act, is at least 150% after such borrowing (if certain requirements are met). As of December 31, 2025 and December 31, 2024, the Company’s asset coverage ratio based on the aggregate amount outstanding of senior securities was 222% and 290          
Debt instrument asset coverage ratio                         222.00% 222.00% 222.00% 290.00%        
Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Weighted average interest rates                             5.40% 6.72% 7.34%      
Average outstanding balance                             $ 968,115 $ 510,310 $ 123,857      
Aggregate borrowing amount committed [1]                         $ 3,275,000 $ 3,275,000 3,275,000 1,255,000        
Maximum borrowing capacity                         3,555,000 3,555,000 $ 3,555,000          
Revolving credit facility interest rate description                             Borrowings thereunder denominated in USD, including amounts drawn in respect of letters of credit, bear interest (at the Company’s election) of either (i) term SOFR plus a margin of either 1.90% or 1.75% (subject to certain gross borrowing base conditions), plus an additional 0.10% credit adjustment spread, (ii) an alternate base rate, which is the highest of (x) Prime Rate in effect on such day, (y) Federal Funds Effective Rate for such day plus 1/2 of 1.00% and (z) term SOFR for an interest period of one (1) month plus 1.00%, plus a margin of either 0.90% or 0.75% (subject to certain gross borrowing base conditions). Borrowings thereunder denominated in non-USD bear interest of the applicable term benchmark rate or daily simple risk-free rate plus a margin of either 1.90% or 1.75% (subject to certain gross borrowing base conditions), plus, in the case of borrowings denominated in (i) Great British Pounds (“GBP”) only, an additional 0.0326% credit adjustment spread or 0.1193% credit adjustment spread, for 1-month tenor and 3-months tenor borrowings, (ii) Swiss Franc (“CHF”) only, a (0.0571)% credit adjustment spread or 0.0031% credit adjustment spread, for 1-month tenor and 3-months tenor borrowings, and (iii) Canadian Dollars (“CAD”) only, an additional 0.29547% credit adjustment spread or 0.32138% credit adjustment spread, for 1-month tenor and 3-months tenor borrowings. With respect to borrowings denominated in USD, the Company may elect either term SOFR or an alternative base rate at the time of borrowing, and such borrowings may be converted from one benchmark to another at any time, subject to certain conditions.          
Cost incurred in obtaining revolving credit facility                         24,901 24,901 $ 24,901          
Deferred financing costs                         18,554 18,554 18,554 $ 9,967        
Truist Revolving Credit Facility | Debt                                        
Line of Credit Facility [Line Items]                                        
Maximum borrowing capacity                         3,555,000 3,555,000 3,555,000          
Truist Revolving Credit Facility | Multicurrency Sub-Facility                                        
Line of Credit Facility [Line Items]                                        
Maximum borrowing capacity                         2,545,000 2,545,000 2,545,000          
Truist Revolving Credit Facility | USD Sub Facility                                        
Line of Credit Facility [Line Items]                                        
Maximum borrowing capacity                         580,000 580,000 580,000          
Truist Revolving Credit Facility | Term Loan                                        
Line of Credit Facility [Line Items]                                        
Maximum borrowing capacity                         $ 150,000 $ 150,000 $ 150,000          
Truist Revolving Credit Facility | United Kingdom, Pounds                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                         0.0326% 0.1193%            
Truist Revolving Credit Facility | Canada, Dollars                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                         0.29547% 0.32138%            
Truist Revolving Credit Facility | Switzerland, Francs                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                         0.0571% 0.0031%            
BNPP Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Weighted average interest rates                             5.92% 6.85% 7.25%      
Average outstanding balance                             $ 709,726 $ 313,497 $ 3,579      
Aggregate borrowing amount committed                         $ 1,100,000 [2] $ 1,100,000 [2] 1,100,000 [2] 900,000 [2]       $ 1,100,000
Cost incurred in obtaining revolving credit facility                         7,796 7,796 7,796          
Deferred financing costs                         4,546 4,546 4,546 $ 5,038        
BNPP Revolving Credit Facility | Debt                                        
Line of Credit Facility [Line Items]                                        
Maximum borrowing capacity                         1,100,000 1,100,000 $ 1,100,000          
BNPP Revolving Credit Facility | SOFR                                        
Line of Credit Facility [Line Items]                                        
Applicable margin for interst rate annum             1.615% 1.63% 1.735%     1.80%                
BNPP Revolving Credit Facility | SOFR | Forecast                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period 1.00%                                      
MS Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Weighted average interest rates                             6.38% 7.22%        
Average outstanding balance                             $ 886,540 $ 497,298        
Aggregate borrowing amount committed                   $ 2,000,000     2,000,000 [3] 2,000,000 [3] 2,000,000 [3] 2,000,000 [3]        
Cost incurred in obtaining revolving credit facility                         17,841 17,841 17,841          
Deferred financing costs                         13,824 13,824 $ 13,824 $ 14,443        
Applicable margin for interst rate annum                             1.80%          
Interest rate during amortization period                             2.30%          
MS Revolving Credit Facility | Debt                                        
Line of Credit Facility [Line Items]                                        
Maximum borrowing capacity                         2,000,000 2,000,000 $ 2,000,000          
MS Facility Second Amendment                                        
Line of Credit Facility [Line Items]                                        
Revolving credit facility maturity date         Aug. 09, 2030                              
Tranche A | MS Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Aggregate borrowing amount committed                     $ 1,000,000                  
Tranche A | MS Revolving Credit Facility | SOFR                                        
Line of Credit Facility [Line Items]                                        
Applicable margin for interst rate annum                     2.35%                  
Applicable margin after expiration of reinvestment period                     2.85%                  
Tranche B | MS Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Aggregate borrowing amount committed                   $ 1,000,000                    
Tranche B | MS Revolving Credit Facility | SOFR                                        
Line of Credit Facility [Line Items]                                        
Applicable margin for interst rate annum                   2.15%                    
Applicable margin after expiration of reinvestment period                   2.65%                    
2028 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, interest rate percentage           5.875%                            
2028 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, principal amount           $ 400,000             400,000 400,000 400,000          
Redeemable notes, interest rate percentage           5.875%                            
Debt instrument, Maturity date, Description           The 2028 Notes bear interest at a rate of 5.875% per year, payable semi-annually, commencing on November 6, 2025. The 2028 Notes will mature on May 6, 2028 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the indenture.                            
2028 Notes | Subsequent Events                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, principal amount   $ 700,000                                    
Redeemable notes, interest rate percentage   5.05%                                    
Debt instrument, Maturity date, Description   The February 2028 Notes bear interest at the rate of 5.050% per annum, payable semi-annually in arrears on February 23 and August 23 of each year, commencing on August 23, 2026. The February 2028 Notes will mature on February 23, 2028 and may be redeemed in whole or in part at our option at any time or from time to time at the redemption prices set forth in the indenture.In connection with the February 2028 Notes, the Company entered into an interest rate swap to more closely align the interest rates of the Company’s fixed rate liabilities with the investment portfolio, which predominately consists of floating rate loans. The Company designated this interest rate swap and the February 2028 in a qualifying fair value hedging relationship.                                    
2030 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, principal amount           $ 600,000                            
Redeemable notes, interest rate percentage           6.25%                            
Debt instrument, Maturity date, Description           The 2030 Notes bear interest at a rate of 6.250% per year, payable semi-annually, commencing on November 6, 2025. The 2030 Notes will mature on May 6, 2030 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the indenture.                            
2030 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, interest rate percentage           6.25%                            
2029 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, principal amount       $ 400,000                 660,000 660,000 660,000       $ 260,000  
Redeemable notes, interest rate percentage       5.375%                             5.375%  
Accrued Interest       $ 2,290                                
Debt instrument, Maturity date, Description       The 2029 Notes bear interest at a rate of 5.375% per year, payable semi-annually, commencing on January 31, 2026. The 2029 Notes will mature on January 31, 2029 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the indenture.                                
New 2029 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, principal amount                                     $ 260,000  
Redeemable notes, interest rate percentage                                     5.375%  
2029 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, interest rate percentage       5.375%                                
2031 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, principal amount     $ 500,000                   $ 500,000 $ 500,000 $ 500,000          
Redeemable notes, interest rate percentage     5.875%                                  
Debt instrument, Maturity date, Description     The 2031 Notes bear interest at a rate of 5.875% per year, payable semi-annually, commencing on July 31, 2026. The 2031 Notes will mature on January 31, 2031 and may be redeemed in whole or in part at the Company’s option at any time or from time to time at the redemption prices set forth in the indenture.                                  
2031 Notes | Subsequent Events                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, principal amount   $ 400,000                                    
Redeemable notes, interest rate percentage   5.875%                                    
2031 Notes                                        
Line of Credit Facility [Line Items]                                        
Redeemable notes, interest rate percentage     5.875%                                  
Line Of Credit | Senior Secured Revolving Credit Facility Non Extending Commitments | Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             0.10%          
Line Of Credit | Senior Secured Revolving Credit Facility Non Extending Commitments | Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             1.00%          
Line Of Credit | Senior Secured Revolving Credit Facility Non Extending Commitments | Truist Revolving Credit Facility | Federal Funds Effective Rate                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment                             1/2 of 1.00%          
Minimum | Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Debt instrument asset coverage ratio                         150.00% 150.00% 150.00%          
Minimum | Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Debt instrument asset coverage ratio                         1.00% 1.00% 1.00%          
Minimum | MS Revolving Credit Facility | Subsequent Events                                        
Line of Credit Facility [Line Items]                                        
Aggregate borrowing amount committed                                   $ 2,000,000    
Minimum | Line Of Credit | Senior Secured Revolving Credit Facility Non Extending Commitments | Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             1.75%          
Minimum | Line Of Credit | Senior Secured Revolving Credit Facility Non Extending Commitments | Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             0.75%          
Minimum | Line Of Credit | Risk Free Interest Rate | Senior Secured Revolving Credit Facility Non Extending Commitments | Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             1.75%          
Maximum | Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Debt instrument asset coverage ratio                         1.50% 1.50% 1.50%          
Maximum | MS Revolving Credit Facility | Subsequent Events                                        
Line of Credit Facility [Line Items]                                        
Aggregate borrowing amount committed                                   $ 2,400,000    
Maximum | Line Of Credit | Senior Secured Revolving Credit Facility Non Extending Commitments | Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             1.90%          
Maximum | Line Of Credit | Senior Secured Revolving Credit Facility Non Extending Commitments | Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             0.90%          
Maximum | Line Of Credit | Risk Free Interest Rate | Senior Secured Revolving Credit Facility Non Extending Commitments | Truist Revolving Credit Facility                                        
Line of Credit Facility [Line Items]                                        
Applicable margin after expiration of reinvestment period                             1.90%          
[1] Provides, under certain circumstances, a total borrowing capacity of $3,555,000. The amount available is reduced by $630 of outstanding letters of credit. The Company may borrow amounts in USD or certain other permitted currencies. Debt outstanding denominated in currencies other than USD has been converted to USD using the applicable foreign currency exchange rate as of the applicable reporting date. As of December 31, 2025, the Company had outstanding borrowings denominated in USD of $2,051,000, in Euros of EUR 298,800, in CAD of CAD 118,050 in GBP of GBP 79,550, in CHF of CHF 24,200, in AUD of AUD 386,250 and in NOK of NOK 90,000. As of December 31, 2024, the Company had outstanding borrowings denominated in USD of $864,000, in Euros of EUR 153,890, in CAD of CAD 59,500, in GBP of GBP 60,500 and in AUD of AUD 34,500. The amount available is reduced by $630 of outstanding letters of credit.
[2] Provides, under certain circumstances, a total borrowing capacity of $1,100,000. The Company may borrow amounts in USD or certain other permitted currencies. Debt outstanding denominated in currencies other than USD has been converted to USD using the applicable foreign currency exchange rate as of the applicable reporting date. As of December 31, 2025, the Company had outstanding borrowings denominated in USD of $850,000. As of December 31, 2024, the Company had outstanding borrowings denominated in USD of $700,000.
[3] Provides, under certain circumstances, a total borrowing capacity of $2,000,000. The Company may borrow amounts in USD or certain other permitted currencies. Debt outstanding denominated in currencies other than USD has been converted to USD using the applicable foreign currency exchange rate as of the applicable reporting date. As of December31, 2025, the Company had outstanding borrowings denominated in USD of $989,900, in GBP of GBP 16,050 and in AUD of AUD 272,150. As of December 31, 2024, the Company had outstanding borrowings denominated in USD of $715,000.