v3.26.1
Fair Value of Financial Instruments - Schedule of Quantitative Information About Significant Unobservable Inputs of Level 3 Investments (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Discounted Cash Flow Analysis    
Fair Value $ 14,680,538 $ 14,286,039
First-lien senior secured debt investments    
Discounted Cash Flow Analysis    
Fair Value 11,444,661 10,979,070
Second-lien senior secured debt investments    
Discounted Cash Flow Analysis    
Fair Value 478,763 568,641
Unsecured debt investments    
Discounted Cash Flow Analysis    
Fair Value 464,478 477,128
Specialty finance debt investments    
Discounted Cash Flow Analysis    
Fair Value 40,774 37,452
Preferred equity investments    
Discounted Cash Flow Analysis    
Fair Value 951,696 1,072,481
Common equity investments    
Discounted Cash Flow Analysis    
Fair Value 747,669 722,100
Specialty finance equity investments    
Discounted Cash Flow Analysis    
Fair Value 515,617 375,812
Level 3    
Discounted Cash Flow Analysis    
Fair Value 13,682,085 13,590,644
Level 3 | First-lien senior secured debt investments    
Discounted Cash Flow Analysis    
Fair Value 11,167,671 10,660,972
Level 3 | First-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Fair Value 10,661,841 9,346,910
Level 3 | First-lien senior secured debt investments | Transaction    
Discounted Cash Flow Analysis    
Fair Value 502,810 1,280,482
Level 3 | First-lien senior secured debt investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Fair Value 3,020 33,580
Level 3 | Second-lien senior secured debt investments    
Discounted Cash Flow Analysis    
Fair Value 433,144 442,717
Level 3 | Second-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Fair Value 433,144 442,717
Level 3 | Second-lien senior secured debt investments | Market Approach    
Discounted Cash Flow Analysis    
Fair Value 4,812  
Level 3 | Unsecured debt investments    
Discounted Cash Flow Analysis    
Fair Value 464,478 477,128
Level 3 | Unsecured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Fair Value 459,666 473,340
Level 3 | Unsecured debt investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Fair Value   3,788
Level 3 | Specialty finance debt investments    
Discounted Cash Flow Analysis    
Fair Value 40,774 37,452
Level 3 | Specialty finance debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Fair Value   37,452
Level 3 | Specialty finance debt investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Fair Value 40,774  
Level 3 | Preferred equity investments    
Discounted Cash Flow Analysis    
Fair Value 951,696 1,072,481
Level 3 | Preferred equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Fair Value   451,265
Level 3 | Preferred equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Fair Value 385,373  
Level 3 | Preferred equity investments | Transaction    
Discounted Cash Flow Analysis    
Fair Value   122,829
Level 3 | Preferred equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Fair Value 16,985  
Level 3 | Preferred equity investments | Market Approach    
Discounted Cash Flow Analysis    
Fair Value 21,827  
Level 3 | Preferred equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Fair Value 527,511 498,387
Level 3 | Common equity investments    
Discounted Cash Flow Analysis    
Fair Value 455,042 684,030
Level 3 | Common equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Fair Value   61,131
Level 3 | Common equity investments | Transaction    
Discounted Cash Flow Analysis    
Fair Value   421,309
Level 3 | Common equity investments | Transaction | Transaction Price    
Discounted Cash Flow Analysis    
Fair Value 252,920  
Level 3 | Common equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Fair Value 11,257  
Level 3 | Common equity investments | Market Approach    
Discounted Cash Flow Analysis    
Fair Value 74,799 214
Level 3 | Common equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Fair Value 103,133  
Level 3 | Common equity investments | Market Approach | Transaction Price    
Discounted Cash Flow Analysis    
Fair Value   110,029
Level 3 | Common equity investments | Market Approach | Market Yield    
Discounted Cash Flow Analysis    
Fair Value 217  
Level 3 | Common equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Fair Value   82,784
Level 3 | Common equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Fair Value 12,251 8,330
Level 3 | Common equity investments | Option Pricing Model    
Discounted Cash Flow Analysis    
Fair Value 465  
Level 3 | Common equity investments | Option Pricing Model | Volatility    
Discounted Cash Flow Analysis    
Fair Value   233
Level 3 | Specialty finance equity investments    
Discounted Cash Flow Analysis    
Fair Value 169,280 215,864
Level 3 | Specialty finance equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Fair Value   6,657
Level 3 | Specialty finance equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Fair Value 5,447  
Level 3 | Specialty finance equity investments | Market Approach    
Discounted Cash Flow Analysis    
Fair Value 139,159 22,602
Level 3 | Specialty finance equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Fair Value 22,613  
Level 3 | Specialty finance equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Fair Value   184,468
Level 3 | Specialty finance equity investments | Discounted Cash Flow Analysis | Market Yield    
Discounted Cash Flow Analysis    
Fair Value $ 2,061  
Level 3 | Specialty finance equity investments | Discounted Cash Flow Analysis | Discounted Factor    
Discounted Cash Flow Analysis    
Fair Value   $ 2,137
Level 3 | Minimum | First-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.071 0.060
Level 3 | Minimum | First-lien senior secured debt investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.980 0.950
Level 3 | Minimum | First-lien senior secured debt investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.080 0.000
Level 3 | Minimum | Second-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.136 0.084
Level 3 | Minimum | Second-lien senior secured debt investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 3.0  
Level 3 | Minimum | Unsecured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.054 0.055
Level 3 | Minimum | Unsecured debt investments | Yield Analysis | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average)   4.3
Level 3 | Minimum | Specialty finance debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.116
Level 3 | Minimum | Specialty finance debt investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.123  
Level 3 | Minimum | Preferred equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.116
Level 3 | Minimum | Preferred equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.129  
Level 3 | Minimum | Preferred equity investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.628
Level 3 | Minimum | Preferred equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.248  
Level 3 | Minimum | Preferred equity investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 9.5  
Level 3 | Minimum | Preferred equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.6 2.0
Level 3 | Minimum | Common equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.275
Level 3 | Minimum | Common equity investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.542
Level 3 | Minimum | Common equity investments | Transaction | Transaction Price    
Discounted Cash Flow Analysis    
Range (Weighted Average) 1.000  
Level 3 | Minimum | Common equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.113  
Level 3 | Minimum | Common equity investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 5.5 9.0
Level 3 | Minimum | Common equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average) 2.5  
Level 3 | Minimum | Common equity investments | Market Approach | Transaction Price    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.0
Level 3 | Minimum | Common equity investments | Market Approach | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 9.3  
Level 3 | Minimum | Common equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average)   4.3
Level 3 | Minimum | Common equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.000
Range (Weighted Average) (0.131)  
Level 3 | Minimum | Common equity investments | Option Pricing Model    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.600  
Level 3 | Minimum | Common equity investments | Option Pricing Model | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.600
Level 3 | Minimum | Specialty finance equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.115
Level 3 | Minimum | Specialty finance equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.118  
Level 3 | Minimum | Specialty finance equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average) 1.200  
Level 3 | Minimum | Specialty finance equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average) 1.0 1.1
Level 3 | Minimum | Specialty finance equity investments | Discounted Cash Flow Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.200  
Level 3 | Minimum | Specialty finance equity investments | Discounted Cash Flow Analysis | Discounted Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.200
Level 3 | Maximum | First-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.282 0.236
Level 3 | Maximum | First-lien senior secured debt investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.996 1.000
Level 3 | Maximum | First-lien senior secured debt investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.080 1.072
Level 3 | Maximum | Second-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.470 0.325
Level 3 | Maximum | Second-lien senior secured debt investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 3.5  
Level 3 | Maximum | Unsecured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.176 0.149
Level 3 | Maximum | Unsecured debt investments | Yield Analysis | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average)   5.0
Level 3 | Maximum | Specialty finance debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.116
Level 3 | Maximum | Specialty finance debt investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.123  
Level 3 | Maximum | Preferred equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.353
Level 3 | Maximum | Preferred equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.535  
Level 3 | Maximum | Preferred equity investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average)   1.000
Level 3 | Maximum | Preferred equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.248  
Level 3 | Maximum | Preferred equity investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 9.5  
Level 3 | Maximum | Preferred equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average) 41.3 25.2
Level 3 | Maximum | Common equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.275
Level 3 | Maximum | Common equity investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average)   8.137
Level 3 | Maximum | Common equity investments | Transaction | Transaction Price    
Discounted Cash Flow Analysis    
Range (Weighted Average) 3.115  
Level 3 | Maximum | Common equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.113  
Level 3 | Maximum | Common equity investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 27.8 9.0
Level 3 | Maximum | Common equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average) 47.5  
Level 3 | Maximum | Common equity investments | Market Approach | Transaction Price    
Discounted Cash Flow Analysis    
Range (Weighted Average)   25.5
Level 3 | Maximum | Common equity investments | Market Approach | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 9.3  
Level 3 | Maximum | Common equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average)   13.0
Level 3 | Maximum | Common equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.000
Range (Weighted Average) 0.263  
Level 3 | Maximum | Common equity investments | Option Pricing Model    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.700  
Level 3 | Maximum | Common equity investments | Option Pricing Model | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.700
Level 3 | Maximum | Specialty finance equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.115
Level 3 | Maximum | Specialty finance equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.118  
Level 3 | Maximum | Specialty finance equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average) 1.500  
Level 3 | Maximum | Specialty finance equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average) 1.0 1.1
Level 3 | Maximum | Specialty finance equity investments | Discounted Cash Flow Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.200  
Level 3 | Maximum | Specialty finance equity investments | Discounted Cash Flow Analysis | Discounted Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.200
Level 3 | Weighted Average | First-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.106 0.094
Level 3 | Weighted Average | First-lien senior secured debt investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.992 0.994
Level 3 | Weighted Average | First-lien senior secured debt investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.080 0.840
Level 3 | Weighted Average | Second-lien senior secured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.216 0.144
Level 3 | Weighted Average | Second-lien senior secured debt investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 3.4  
Level 3 | Weighted Average | Unsecured debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.126 0.119
Level 3 | Weighted Average | Unsecured debt investments | Yield Analysis | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average)   4.8
Level 3 | Weighted Average | Specialty finance debt investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.116
Level 3 | Weighted Average | Specialty finance debt investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.123  
Level 3 | Weighted Average | Preferred equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.140
Level 3 | Weighted Average | Preferred equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.184  
Level 3 | Weighted Average | Preferred equity investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.865
Level 3 | Weighted Average | Preferred equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.248  
Level 3 | Weighted Average | Preferred equity investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 9.5  
Level 3 | Weighted Average | Preferred equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average) 7.4 7.3
Level 3 | Weighted Average | Common equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.275
Level 3 | Weighted Average | Common equity investments | Transaction    
Discounted Cash Flow Analysis    
Range (Weighted Average)   4.443
Level 3 | Weighted Average | Common equity investments | Transaction | Transaction Price    
Discounted Cash Flow Analysis    
Range (Weighted Average) 2.9940  
Level 3 | Weighted Average | Common equity investments | Recovery Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.113  
Level 3 | Weighted Average | Common equity investments | Market Approach    
Discounted Cash Flow Analysis    
Range (Weighted Average) 12.7 9.0
Level 3 | Weighted Average | Common equity investments | Market Approach | Revenue Multiple    
Discounted Cash Flow Analysis    
Range (Weighted Average) 8.6  
Level 3 | Weighted Average | Common equity investments | Market Approach | Transaction Price    
Discounted Cash Flow Analysis    
Range (Weighted Average)   11.9
Level 3 | Weighted Average | Common equity investments | Market Approach | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 9.3  
Level 3 | Weighted Average | Common equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average)   10.1
Level 3 | Weighted Average | Common equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.000
Range (Weighted Average) 0.060  
Level 3 | Weighted Average | Common equity investments | Option Pricing Model    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.699  
Level 3 | Weighted Average | Common equity investments | Option Pricing Model | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.699
Level 3 | Weighted Average | Specialty finance equity investments | Yield Analysis    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.115
Level 3 | Weighted Average | Specialty finance equity investments | Yield Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.118  
Level 3 | Weighted Average | Specialty finance equity investments | Market Approach | Volatility    
Discounted Cash Flow Analysis    
Range (Weighted Average) 1.400  
Level 3 | Weighted Average | Specialty finance equity investments | Market Approach | Market Adjustment Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average) 1.0 1.1
Level 3 | Weighted Average | Specialty finance equity investments | Discounted Cash Flow Analysis | Market Yield    
Discounted Cash Flow Analysis    
Range (Weighted Average) 0.200  
Level 3 | Weighted Average | Specialty finance equity investments | Discounted Cash Flow Analysis | Discounted Factor    
Discounted Cash Flow Analysis    
Range (Weighted Average)   0.200