Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Unobservable Inputs (Details)

v3.24.1.1.u2
Fair Value Measurements - Unobservable Inputs (Details)
$ in Thousands
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 9,917,572 $ 9,289,410
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 8,697,747 8,028,268
Amount excluded from measurement input 1,856,912 1,559,804
Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 18,546 $ 21,039
Valuation, Market Approach | Minimum | Recovery Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.3430 0.7321
Valuation, Market Approach | Maximum | Recovery Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.7281 0.7321
Valuation, Market Approach | Weighted Average | Recovery Rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.7085 0.7321
Total Investments    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 9,754,281 $ 9,165,407
Total Investments | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 8,697,747 8,028,268
First lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 9,557,342 9,002,695
First lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 8,557,580 7,956,235
First lien debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 6,745,841 $ 6,422,647
First lien debt | Valuation, Market Approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0788 0.0809
First lien debt | Valuation, Market Approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2075 0.3564
First lien debt | Valuation, Market Approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1184 0.1203
Second lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 36,495 $ 67,087
Second lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 19,764 19,441
Second lien debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 19,764 $ 19,441
Second lien debt | Valuation, Market Approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1293 0.1296
Second lien debt | Valuation, Market Approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1687 0.1724
Second lien debt | Valuation, Market Approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1492 0.1539
Unsecured debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 29,670 $ 29,101
Unsecured debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 16,603 15,936
Unsecured debt | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 16,603 $ 1,295
Unsecured debt | Valuation, Market Approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1357 0.1600
Unsecured debt | Valuation, Market Approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1538 0.1600
Unsecured debt | Valuation, Market Approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1491 0.1600
Preferred equity | Valuation, Market Approach | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 27,692 $ 1,510
Preferred equity | Valuation, Market Approach | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1358 0.1450
Preferred equity | Valuation, Market Approach | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1500 0.1631
Preferred equity | Valuation, Market Approach | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1477 0.1494
Common equity | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 12,389 $ 2,532
Common equity | Valuation Technique, Discounted Cash Flow | Minimum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0900 0.0900
Common equity | Valuation Technique, Discounted Cash Flow | Minimum | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.00 10.00
Common equity | Valuation Technique, Discounted Cash Flow | Minimum | Terminal growth rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0300 0.0300
Common equity | Valuation Technique, Discounted Cash Flow | Maximum | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1500 0.1500
Common equity | Valuation Technique, Discounted Cash Flow | Maximum | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00 10.00
Common equity | Valuation Technique, Discounted Cash Flow | Maximum | Terminal growth rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0300 0.0300
Common equity | Valuation Technique, Discounted Cash Flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1181 0.0947
Common equity | Valuation Technique, Discounted Cash Flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00 10.00
Common equity | Valuation Technique, Discounted Cash Flow | Weighted Average | Terminal growth rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0300 0.0300
Equity investments    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 40,081 $ 36,656
Equity investments | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 40,081 $ 36,656
Non-advisor developed | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 8,697,747