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Fair Value Measurement - Ranges of Significant Unobservable Inputs to Value Level 3 Assets (Details) $ in Thousands | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
--- | --- | ---
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value |  | $ 349,200 | $ 281,533
Level 3 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value |  | 179,001 | 192,891
Debt |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value |  | 214,667 | 236,718
Debt | Level 3 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value |  | 137,055 | 159,954
Debt | Level 3 | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] | 97,988 | 117,413
Debt | Level 3 | Recent Transaction |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] |  | 35,710
Debt | Level 3 | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] | 38,099 | $ 6,831
Debt | Level 3 | Broker Quotes |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] | $ 968 |
Debt | Level 3 | Minimum | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.0825 | 0.0937
Debt | Level 3 | Minimum | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.0015 | 0.003
Debt | Level 3 | Minimum | Broker Quotes |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) |  | 0.93 |
Debt | Level 3 | Maximum | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.3165 | 0.2248
Debt | Level 3 | Maximum | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.06 | 0.08
Debt | Level 3 | Maximum | Broker Quotes |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) |  | 0.985 |
Debt | Level 3 | Weighted Average | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.1496 | 0.1513
Debt | Level 3 | Weighted Average | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.0246 | 0.0466
Equity/Other |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value |  | $ 45,835 | $ 36,367
Equity/Other | Level 3 |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value |  | 41,946 | 32,937
Equity/Other | Level 3 | Equity Funds One | Recent Transaction |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] | 183 | 20,327
Equity/Other | Level 3 | Equity Funds Two | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] | $ 28,141 | $ 6,401
Equity/Other | Level 3 | Equity Funds Two | Minimum | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.0009 | 0.0009
Equity/Other | Level 3 | Equity Funds Two | Maximum | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.095 | 0.0825
Equity/Other | Level 3 | Equity Funds Two | Weighted Average | Market Approach | Earnings Multiple |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.0323 | 0.0667
Equity/Other | Level 3 | Equity Funds Three | Insurance Industry Model | Estimated Losses |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] | $ 6,629 | $ 6,155
Equity/Other | Level 3 | Equity Funds Three | Minimum | Insurance Industry Model | Estimated Losses |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0 | 0
Equity/Other | Level 3 | Equity Funds Three | Maximum | Insurance Industry Model | Estimated Losses |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.65 | 0.65
Equity/Other | Level 3 | Equity Funds Three | Weighted Average | Insurance Industry Model | Estimated Losses |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.325 | 0.325
Equity/Other | Level 3 | Equity Funds Four | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1] | $ 6,908 |
Equity/Other | Level 3 | Equity Funds Four | Asset Recovery Liquidation Valuation Technique |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair value | [1],[3] | $ 85 | $ 54
Equity/Other | Level 3 | Equity Funds Four | Minimum | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.175 |
Equity/Other | Level 3 | Equity Funds Four | Maximum | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.195 |
Equity/Other | Level 3 | Equity Funds Four | Weighted Average | Income Approach | Discount Rate |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Range (Weighted Average) | [1],[2] | 0.185 |
[1] | The fair value of any one instrument may be determined using multiple valuation techniques or unobservable inputs.
[2] | Weighted average for an asset category consisting of multiple investments is calculated by weighting the significant unobservable input by the relative fair value of the investment. The range and weighted average for an asset category consisting of a single investment represents the significant unobservable input used in the fair value of the investment.
[3] | Investments valued using the asset recovery or liquidation technique include investments for which valuation is based on current financial data without a discount rate applied.

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