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Investments In Securities and Fair Value (Schedule Of Unrealized Losses On Investments) (Details) $ in Thousands | Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 54 | 9
Special revenue issuer obligations of U.S. states, territories and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, Less than 12 Months, Fair Value | $ 40,573 | $ 0
Total temporarily impaired securities, Less than 12 Months, Unrealized Losses | (1,369) | 0
Total temporarily impaired securities, 12 Months or Longer, Fair Value | 1,100 | 1,102
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (3) | (2)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 41,673 | 1,102
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (1,372) | (2)
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, Less than 12 Months, Fair Value | 688 | 8,493
Total temporarily impaired securities, Less than 12 Months, Unrealized Losses | (16) | (13)
Total temporarily impaired securities, 12 Months or Longer, Fair Value | 49 | 6,203
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (1) | (35)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 737 | 14,696
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (17) | (48)
Total temporarily impaired securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, Less than 12 Months, Fair Value | 41,261 | 8,493
Total temporarily impaired securities, Less than 12 Months, Unrealized Losses | (1,385) | (13)
Total temporarily impaired securities, 12 Months or Longer, Fair Value | 1,149 | 7,305
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (4) | (37)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 42,410 | 15,798
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ (1,389) | $ (50)

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