Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Unobservable Inputs (Details)

v3.24.1
Fair Value Measurements - Unobservable Inputs (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 9,289,410 $ 5,716,521
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 8,028,268 4,895,099
Amount excluded from measurement input 1,559,804 1,043,296
Market approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 21,039  
Market approach | Minimum | Recovery Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.7321  
Market approach | Maximum | Recovery Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.7321  
Market approach | Weighted Average | Recovery Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.7321  
First lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 9,002,695 5,614,718
First lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 7,956,235 4,882,393
First lien debt | Market approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 6,422,647 $ 3,848,793
First lien debt | Market approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0809 0.0814
First lien debt | Market approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3564 0.1770
First lien debt | Market approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1203 0.1147
Second lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 67,087 $ 45,248
Second lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 19,441 8,794
Second lien debt | Market approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 19,441  
Second lien debt | Market approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1296  
Second lien debt | Market approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1724  
Second lien debt | Market approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1539  
Unsecured debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 29,101 25,512
Unsecured debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 15,936 1,606
Unsecured debt | Market approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 1,295 $ 704
Unsecured debt | Market approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1600 0.1470
Unsecured debt | Market approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1600 0.1470
Unsecured debt | Market approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1600 0.1470
Preferred equity | Market approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 1,510  
Preferred equity | Market approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1450  
Preferred equity | Market approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1631  
Preferred equity | Market approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1494  
Common equity | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,532  
Common equity | Discounted cash flow | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0900  
Common equity | Discounted cash flow | Minimum | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00  
Common equity | Discounted cash flow | Minimum | Terminal growth rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0300  
Common equity | Discounted cash flow | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1500  
Common equity | Discounted cash flow | Maximum | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00  
Common equity | Discounted cash flow | Maximum | Terminal growth rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0300  
Common equity | Discounted cash flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0947  
Common equity | Discounted cash flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00  
Common equity | Discounted cash flow | Weighted Average | Terminal growth rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0300  
Equity investments    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 36,656 $ 2,306
Equity investments | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 36,656 2,306
Equity investments | Market approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 2,108
Equity investments | Market approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.0708
Equity investments | Market approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1695
Equity investments | Market approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1196
Equity investments | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 198
Equity investments | Discounted cash flow | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1500
Equity investments | Discounted cash flow | Minimum | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   10.00
Equity investments | Discounted cash flow | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1500
Equity investments | Discounted cash flow | Maximum | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   10.00
Equity investments | Discounted cash flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1500
Equity investments | Discounted cash flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   10.00