Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Unobservable Inputs (Details)

v3.23.3
Fair Value Measurements - Unobservable Inputs (Details)
$ in Thousands
Sep. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 7,693,866 $ 5,716,521
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 6,716,578 4,895,099
Amount excluded from measurement input 1,319,435 1,043,296
First lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 7,570,540 5,614,718
First lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 6,681,145 4,882,393
First lien debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 5,372,388 $ 3,848,793
First lien debt | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0817 0.0814
First lien debt | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2929 0.1770
First lien debt | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1218 0.1147
Second lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 66,396 $ 45,248
Second lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 20,382 8,794
Second lien debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 20,382  
Second lien debt | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1300  
Second lien debt | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1444  
Second lien debt | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1427  
Unsecured debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 14,935 25,512
Unsecured debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 2,342 1,606
Unsecured debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,118 $ 704
Unsecured debt | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1346 0.1470
Unsecured debt | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1494 0.1470
Unsecured debt | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1421 0.1470
Preferred equity | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,061  
Preferred equity | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1470  
Preferred equity | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1667  
Preferred equity | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1560  
Common equity | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 194  
Common equity | Valuation Technique, Discounted Cash Flow | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1500  
Common equity | Valuation Technique, Discounted Cash Flow | Minimum | Measurement Input, Exit Multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00  
Common equity | Valuation Technique, Discounted Cash Flow | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1500  
Common equity | Valuation Technique, Discounted Cash Flow | Maximum | Measurement Input, Exit Multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00  
Common equity | Valuation Technique, Discounted Cash Flow | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1500  
Common equity | Valuation Technique, Discounted Cash Flow | Weighted Average | Measurement Input, Exit Multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00  
Equity investments    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 12,709 $ 2,306
Equity investments | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 12,709 2,306
Equity investments | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 2,108
Equity investments | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.0708
Equity investments | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1695
Equity investments | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1196
Equity investments | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 198
Equity investments | Valuation Technique, Discounted Cash Flow | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1500
Equity investments | Valuation Technique, Discounted Cash Flow | Minimum | Measurement Input, Exit Multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   10.00
Equity investments | Valuation Technique, Discounted Cash Flow | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1500
Equity investments | Valuation Technique, Discounted Cash Flow | Maximum | Measurement Input, Exit Multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   10.00
Equity investments | Valuation Technique, Discounted Cash Flow | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   0.1500
Equity investments | Valuation Technique, Discounted Cash Flow | Weighted Average | Measurement Input, Exit Multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   10.00