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Fair Value Of Financial Instruments (Schedule of Fair Value of Investments in and Unfunded Commitments to Funds Measured at Net Asset Value) (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair value of investments | $ 37,485 | $ 32,127
Unfunded commitments | 18,368 | 19,509
Partnership Interests [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair value of investments | 31,519 | 29,277
Unfunded commitments | 18,368 | 19,509
Money Market Funds [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair value of investments | 5,061 | 1,932
Mutual Funds [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair value of investments | 616 | 574
Private Equity Funds [Member] |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items] |  |
Fair value of investments | $ 289 | $ 344

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