v3.25.2
Investment Valuations and Fair Value Measurements - Summary of Major Security Type of Fair Valuations (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total $ 723,293 $ 753,814
Debt    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 168,757 172,216
Equity    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 120,832 108,136
Investment Funds & Vehicles    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 38,243 [1] 51,230 [2]
Short-Term Investments    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 394,467 420,466
Cash Equivalents    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 994 1,766
Fair Value, Inputs, Level 1    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 395,461 422,232
Fair Value, Inputs, Level 1 | Debt    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 1 | Equity    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 1 | Investment Funds & Vehicles    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 [1] 0 [2]
Fair Value, Inputs, Level 1 | Short-Term Investments    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 394,467 420,466
Fair Value, Inputs, Level 1 | Cash Equivalents    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 994 1,766
Fair Value, Inputs, Level 2    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 2 | Debt    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 2 | Equity    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 2 | Investment Funds & Vehicles    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 [1] 0 [2]
Fair Value, Inputs, Level 2 | Short-Term Investments    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 2 | Cash Equivalents    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 3    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 289,589 280,352
Fair Value, Inputs, Level 3 | Debt    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 168,757 172,216
Fair Value, Inputs, Level 3 | Equity    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 120,832 108,136
Fair Value, Inputs, Level 3 | Investment Funds & Vehicles    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 [1] 0 [2]
Fair Value, Inputs, Level 3 | Short-Term Investments    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value, Inputs, Level 3 | Cash Equivalents    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value Measured at Net Asset Value Per Share    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 38,243 51,230
Fair Value Measured at Net Asset Value Per Share | Debt    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value Measured at Net Asset Value Per Share | Equity    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value Measured at Net Asset Value Per Share | Investment Funds & Vehicles    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 38,243 [1] 51,230 [2]
Fair Value Measured at Net Asset Value Per Share | Short-Term Investments    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total 0 0
Fair Value Measured at Net Asset Value Per Share | Cash Equivalents    
Investment Valuations And Fair Value Measurements [Line Items]    
Investments Fair Value , Total $ 0 $ 0
[1] Includes equity investments in Strategic Ventures. In accordance with ASC Topic 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Consolidated Statements of Assets and Liabilities.
[2] Includes equity investments in Strategic Ventures. In accordance with ASC Topic 820-10, certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Consolidated Statements of Assets and Liabilities.