v3.26.1
Fair Value of Investments - Schedule of Quantitative Information About Significant Unobservable Inputs of Level 3 Investments (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 5,056,913 [1],[2] $ 6,207,136 [3],[4]
First-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 4,406,237 5,484,795
Second-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 197,494 267,441
Unsecured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 63,452 66,531
Preferred equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 164,403 173,230
Common equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 113,200 101,617
Specialty finance equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 97,207 89,389
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 4,493,155 5,295,125
Level 3 | Quote | Quote    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 2,800  
Level 3 | First-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 4,057,524 4,802,901
Level 3 | First-lien senior secured debt investments | Yield Analysis | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 4,037,587 $ 4,114,791
Level 3 | First-lien senior secured debt investments | Yield Analysis | Minimum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.071 0.060
Level 3 | First-lien senior secured debt investments | Yield Analysis | Maximum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.238 0.236
Level 3 | First-lien senior secured debt investments | Yield Analysis | Weighted Average | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.102 0.090
Level 3 | First-lien senior secured debt investments | Recovery Analysis | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 11,580  
Level 3 | First-lien senior secured debt investments | Recovery Analysis | Minimum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.535  
Level 3 | First-lien senior secured debt investments | Recovery Analysis | Maximum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 1.000  
Level 3 | First-lien senior secured debt investments | Recovery Analysis | Weighted Average | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.551  
Level 3 | First-lien senior secured debt investments | Recent Transaction | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 672,593
Level 3 | First-lien senior secured debt investments | Recent Transaction | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   0.950
Level 3 | First-lien senior secured debt investments | Recent Transaction | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   0.998
Level 3 | First-lien senior secured debt investments | Recent Transaction | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   0.994
Level 3 | First-lien senior secured debt investments | Transaction | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 8,357  
Level 3 | First-lien senior secured debt investments | Transaction | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.990  
Level 3 | First-lien senior secured debt investments | Transaction | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.996  
Level 3 | First-lien senior secured debt investments | Transaction | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.995  
Level 3 | First-lien senior secured debt investments | Collateral Analysis | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 15,517
Level 3 | First-lien senior secured debt investments | Collateral Analysis | Weighted Average | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   0.775
Level 3 | Second-lien senior secured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 131,763 $ 161,254
Level 3 | Second-lien senior secured debt investments | Yield Analysis | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 131,763 $ 161,254
Level 3 | Second-lien senior secured debt investments | Yield Analysis | Minimum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.136 0.084
Level 3 | Second-lien senior secured debt investments | Yield Analysis | Maximum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.329 0.325
Level 3 | Second-lien senior secured debt investments | Yield Analysis | Weighted Average | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.174 0.174
Level 3 | Unsecured debt investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 63,452 $ 66,531
Level 3 | Unsecured debt investments | Yield Analysis | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 60,624 $ 63,400
Level 3 | Unsecured debt investments | Yield Analysis | Minimum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.115 0.108
Level 3 | Unsecured debt investments | Yield Analysis | Maximum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.147 0.142
Level 3 | Unsecured debt investments | Yield Analysis | Weighted Average | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.130 0.124
Level 3 | Unsecured debt investments | Quote | Quote    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 3,131
Level 3 | Unsecured debt investments | Quote | Weighted Average | Quote    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   1.044
Level 3 | Unsecured debt investments | Market Approach | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 9,728  
Level 3 | Unsecured debt investments | Market Approach | Minimum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 9.50  
Level 3 | Unsecured debt investments | Market Approach | Maximum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 9.50  
Level 3 | Unsecured debt investments | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 9.50  
Level 3 | Preferred equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 164,403 $ 173,230
Level 3 | Preferred equity investments | Yield Analysis | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 112,735 $ 127,154
Level 3 | Preferred equity investments | Yield Analysis | Minimum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.129 0.116
Level 3 | Preferred equity investments | Yield Analysis | Maximum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.386 0.225
Level 3 | Preferred equity investments | Yield Analysis | Weighted Average | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.198 0.136
Level 3 | Preferred equity investments | Recovery Analysis | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 3,755  
Level 3 | Preferred equity investments | Recovery Analysis | Minimum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.248  
Level 3 | Preferred equity investments | Recovery Analysis | Maximum | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.248  
Level 3 | Preferred equity investments | Recovery Analysis | Weighted Average | Recovery Rate    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.248  
Level 3 | Preferred equity investments | Recent Transaction | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 22,950
Level 3 | Preferred equity investments | Recent Transaction | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   0.628
Level 3 | Preferred equity investments | Recent Transaction | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   1.000
Level 3 | Preferred equity investments | Recent Transaction | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   0.850
Level 3 | Preferred equity investments | Market Approach | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 38,185 $ 17,550
Level 3 | Preferred equity investments | Market Approach | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 5,576
Level 3 | Preferred equity investments | Market Approach | Minimum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 4.4 4.8
Level 3 | Preferred equity investments | Market Approach | Maximum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 41.3 14.8
Level 3 | Preferred equity investments | Market Approach | Weighted Average | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 13.7 8.9
Level 3 | Preferred equity investments | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   128.9
Level 3 | Common equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 73,949 $ 88,586
Level 3 | Common equity investments | Recent Transaction | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value   $ 20,251
Level 3 | Common equity investments | Recent Transaction | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   1.000
Level 3 | Common equity investments | Recent Transaction | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   1.732
Level 3 | Common equity investments | Recent Transaction | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent)   1.062
Level 3 | Common equity investments | Transaction | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 225  
Level 3 | Common equity investments | Transaction | Minimum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 1.000  
Level 3 | Common equity investments | Transaction | Maximum | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 1.000  
Level 3 | Common equity investments | Transaction | Weighted Average | Transaction Price    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 1.000  
Level 3 | Common equity investments | Market Approach | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 29,401 $ 26,777
Level 3 | Common equity investments | Market Approach | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value 38,782 37,806
Level 3 | Common equity investments | Market Approach | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 5,460 $ 3,712
Level 3 | Common equity investments | Market Approach | Minimum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 4.3 5.3
Level 3 | Common equity investments | Market Approach | Minimum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 9.0 8.75
Level 3 | Common equity investments | Market Approach | Minimum | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) (0.131)  
Level 3 | Common equity investments | Market Approach | Maximum | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 47.5 13.0
Level 3 | Common equity investments | Market Approach | Maximum | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 27.8 25.50
Level 3 | Common equity investments | Market Approach | Maximum | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.263  
Level 3 | Common equity investments | Market Approach | Weighted Average | Revenue Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 12.8 9.9
Level 3 | Common equity investments | Market Approach | Weighted Average | EBITDA Multiple    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 12.9 13.12
Level 3 | Common equity investments | Market Approach | Weighted Average | Market Adjustment Factor    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.060 0
Level 3 | Common equity investments | Option Pricing Model | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 81 $ 40
Level 3 | Common equity investments | Option Pricing Model | Minimum | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.700  
Level 3 | Common equity investments | Option Pricing Model | Maximum | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.700  
Level 3 | Common equity investments | Option Pricing Model | Weighted Average | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.700 0.70
Level 3 | Specialty finance equity investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 2,064 $ 2,623
Level 3 | Specialty finance equity investments | Yield Analysis | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 2,064 $ 2,623
Level 3 | Specialty finance equity investments | Yield Analysis | Minimum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.118  
Level 3 | Specialty finance equity investments | Yield Analysis | Maximum | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.118  
Level 3 | Specialty finance equity investments | Yield Analysis | Weighted Average | Market Yield    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Measurement input (as a percent) 0.118 0.115
[1] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on our restricted securities.
[2] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Company’s Amended and Restated Senior Secured Revolving Credit Agreement (the “Revolving Credit Facility”) and credit facilities to which certain of the Company’s subsidiaries are parties (the “SPV Asset Facilities” and the “CLOs”). See “Note 5 — Debt.”
[3] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 30 for additional information on our restricted securities.
[4] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Company’s Amended and Restated Senior Secured Revolving Credit Agreement (the “Revolving Credit Facility”) and credit facilities to which certain of the Company’s subsidiaries are parties (the “SPV Asset Facilities” and the “CLOs”). See “Note 5 — Debt.”