Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Unobservable Inputs (Details)

v3.23.2
Fair Value Measurements - Unobservable Inputs (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 7,025,359 $ 5,716,521
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 6,130,906 4,895,099
Amount excluded from measurement input 372,852 1,043,296
First lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 6,928,353 5,614,718
First lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 6,104,163 4,882,393
First lien debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 5,735,576 $ 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 8.41% 8.14%
First lien debt | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 19.06% 17.70%
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 12.20% 11.47%
Second lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 48,622 $ 45,248
Second lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 20,039 8,794
Second lien debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 18,106  
Second lien debt | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 15.34%  
Second lien debt | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 16.29%  
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 15.79%  
Unsecured debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 14,702 25,512
Unsecured debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 1,975 1,606
Unsecured debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 1,976 $ 704
Unsecured debt | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 13.46% 14.70%
Unsecured debt | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 15.30% 14.70%
Unsecured debt | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 14.35% 14.70%
Preferred equity | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,220  
Preferred equity | Valuation, Market Approach | Minimum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 11.86%  
Preferred equity | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 17.46%  
Preferred equity | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 14.72%  
Common equity | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 176  
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 15.00%  
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 15.00%  
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 15.00%  
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 $ 4,729 $ 2,306
Equity investments | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 4,729 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   7.08%
Equity investments | Valuation, Market Approach | Maximum | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   16.95%
Equity investments | Valuation, Market Approach | Weighted Average | Measurement Input, Discount Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input   11.96%
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   15.00%
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   1000.00%
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   15.00%
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   1000.00%
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   15.00%
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   1000.00%