v3.26.1
Fair Value Measurements - Unobservable Inputs (Details)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 25,007,853,000 $ 25,337,420,000
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 23,013,722,000 23,197,844,000
Amount excluded from measurement input 3,998,482,000 5,811,426,000
Total Investments    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 24,581,639,000 24,921,176,000
Total Investments | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 23,013,722,000 23,197,844,000
First lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 23,859,681,000 24,395,495,000
First lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 22,351,784,000 22,744,446,000
First lien debt | Yield analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 18,390,024,000 $ 16,911,655,000
First lien debt | Yield analysis | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0592 0.0606
First lien debt | Yield analysis | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.4592 0.3701
First lien debt | Yield analysis | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0949 0.0956
First lien debt | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 159,166,000 $ 99,057,000
First lien debt | Discounted cash flow | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0950 0.0950
First lien debt | Discounted cash flow | Low | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 2.90 2.90
First lien debt | Discounted cash flow | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2000 0.2000
First lien debt | Discounted cash flow | High | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.21 10.20
First lien debt | Discounted cash flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1546 0.1299
First lien debt | Discounted cash flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.68 9.50
First lien debt | Recovery analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 18,886,000 $ 18,556,000
First lien debt | Recovery analysis | Low | Recovery rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.4170 0.4391
First lien debt | Recovery analysis | High | Recovery rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.4170 0.4391
First lien debt | Recovery analysis | Weighted Average | Recovery rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.4170 0.4391
Second lien debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 27,742,000 $ 27,881,000
Second lien debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 27,742,000 27,881,000
Second lien debt | Yield analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 25,000,000 $ 25,216,000
Second lien debt | Yield analysis | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0867 0.0856
Second lien debt | Yield analysis | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0867 0.0856
Second lien debt | Yield analysis | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0867 0.0856
Second lien debt | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,742,000 $ 2,665,000
Second lien debt | Discounted cash flow | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0950 0.0950
Second lien debt | Discounted cash flow | Low | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.48 8.48
Second lien debt | Discounted cash flow | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0950 0.0950
Second lien debt | Discounted cash flow | High | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.48 8.48
Second lien debt | Discounted cash flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0950 0.0950
Second lien debt | Discounted cash flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.48 8.48
Other secured debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 228,097,000 $ 226,763,000
Other secured debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 228,097,000 226,763,000
Other secured debt | Yield analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 200,784,000 $ 132,515,000
Other secured debt | Yield analysis | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0849 0.0862
Other secured debt | Yield analysis | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1155 0.1591
Other secured debt | Yield analysis | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0998 0.1085
Unsecured debt    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 54,450,000 $ 60,145,000
Unsecured debt | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value 48,196,000 46,809,000
Unsecured debt | Yield analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 37,533,000 $ 36,454,000
Unsecured debt | Yield analysis | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1243 0.1272
Unsecured debt | Yield analysis | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1758 0.1766
Unsecured debt | Yield analysis | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1465 0.1466
Unsecured debt | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 10,570,000 $ 10,262,000
Unsecured debt | Discounted cash flow | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1700 0.1600
Unsecured debt | Discounted cash flow | Low | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 9.00 9.00
Unsecured debt | Discounted cash flow | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1700 0.1600
Unsecured debt | Discounted cash flow | High | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 9.00 9.00
Unsecured debt | Discounted cash flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1700 0.1600
Unsecured debt | Discounted cash flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 9.00 9.00
Unsecured debt | Recovery analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 93,000 $ 93,000
Unsecured debt | Recovery analysis | Low | Recovery rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0525 0.0542
Unsecured debt | Recovery analysis | High | Recovery rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0525 0.0542
Unsecured debt | Recovery analysis | Weighted Average | Recovery rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0525 0.0542
Structured Finance Obligations | Yield analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 30,459,000 $ 29,738,000
Structured Finance Obligations | Yield analysis | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0639 0.0623
Structured Finance Obligations | Yield analysis | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1188 0.1224
Structured Finance Obligations | Yield analysis | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1065 0.1088
Preferred equity | Yield analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 75,570,000 $ 69,922,000
Preferred equity | Yield analysis | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1030 0.0860
Preferred equity | Yield analysis | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1964 0.2423
Preferred equity | Yield analysis | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1646 0.1789
Preferred equity | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 12,682,000 $ 13,125,000
Preferred equity | Discounted cash flow | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0950 0.0950
Preferred equity | Discounted cash flow | Low | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.75 8.75
Preferred equity | Discounted cash flow | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.2000 0.2000
Preferred equity | Discounted cash flow | High | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.00 10.00
Preferred equity | Discounted cash flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1216 0.1225
Preferred equity | Discounted cash flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 9.68 9.67
Common equity | Yield analysis | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 16,634,000 $ 9,751,000
Common equity | Yield analysis | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0800 0.0800
Common equity | Yield analysis | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1500 0.0800
Common equity | Yield analysis | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1082 0.0800
Common equity | Discounted cash flow | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 35,097,000 $ 27,409,000
Common equity | Discounted cash flow | Low | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0683 0.0731
Common equity | Discounted cash flow | Low | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 5.67 5.55
Common equity | Discounted cash flow | Low | Cap rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0803 0.0829
Common equity | Discounted cash flow | High | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1700 0.2000
Common equity | Discounted cash flow | High | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 10.21 11.50
Common equity | Discounted cash flow | High | Cap rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0803 0.0829
Common equity | Discounted cash flow | Weighted Average | Discount rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.1100 0.1229
Common equity | Discounted cash flow | Weighted Average | Exit multiple | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 8.31 9.60
Common equity | Discounted cash flow | Weighted Average | Cap rate | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement input 0.0803 0.0829
Non-advisor developed | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 23,013,722,000 $ 23,197,844