v3.26.1
Fair Value Measurements - Investments - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Portfolio Companies $ 10,482,237 $ 9,009,449
Level III    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Portfolio Companies $ 10,444,090 $ 8,980,760
Level III | Weighted Average | Weight Ascribed to Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.447  
Level III | Weighted Average | Weight Ascribed to Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.450  
Level III | Weighted Average | Weight Ascribed to Transaction Price/Other    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.103  
Level III | Weighted Average | Enterprise Value / Forward EBITDA Multiple | Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 14.1  
Level III | Weighted Average | Enterprise Value / Forward Revenues Multiple | Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 8.2  
Level III | Weighted Average | Weighted Average Cost of Capital | Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.141  
Level III | Weighted Average | Enterprise Value / EBITDA Exit Multiple | Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 14.6  
Level III | Minimum | Weight Ascribed to Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.000  
Level III | Minimum | Weight Ascribed to Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.000  
Level III | Minimum | Weight Ascribed to Transaction Price/Other    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.000  
Level III | Minimum | Enterprise Value / Forward EBITDA Multiple | Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 5.5  
Level III | Minimum | Enterprise Value / Forward Revenues Multiple | Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 2.3  
Level III | Minimum | Weighted Average Cost of Capital | Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.068  
Level III | Minimum | Enterprise Value / EBITDA Exit Multiple | Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 8.0  
Level III | Maximum | Weight Ascribed to Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 1.000  
Level III | Maximum | Weight Ascribed to Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.750  
Level III | Maximum | Weight Ascribed to Transaction Price/Other    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 1.000  
Level III | Maximum | Enterprise Value / Forward EBITDA Multiple | Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 25.5  
Level III | Maximum | Enterprise Value / Forward Revenues Multiple | Market Comparables    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 11.9  
Level III | Maximum | Weighted Average Cost of Capital | Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 0.235  
Level III | Maximum | Enterprise Value / EBITDA Exit Multiple | Discounted Cash Flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, measurement input (as a percent) 23.3