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Fair Value Of Financial Instruments (Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024
Asset-Backed Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning Balance | $ 1,239 | $ 1,498
Realized gains/(losses) | 903 | 1,300
Redemptions | (939) | (1,595)
Net change | (36) | (295)
Ending Balance | 1,203 | 1,203
Syndicated Loans [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning Balance | 97,730 | 82,964
Unrealized gains/(losses) | (27) | 1,548
Realized gains/(losses) | (196) | (1,792)
Purchases | 6,792 | 28,428
Sales | (32,687) | (32,944)
Redemptions | (5,899) | (12,491)
Net change | (32,017) | (17,251)
Ending Balance | 65,713 | 65,713
Corporate Equity Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning Balance | 11,878 | 11,878
Net change | 0 | 0
Ending Balance | 11,878 | 11,878
Auction Rate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning Balance | 783 | 783
Unrealized gains/(losses) | (44) | (44)
Net change | (44) | (44)
Ending Balance | 739 | 739
Other Investment [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning Balance | 39,467 | 39,467
Unrealized gains/(losses) | (118) | (118)
Net change | (118) | (118)
Ending Balance | $ 39,349 | $ 39,349

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