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Investments In Securities and Fair Value (Schedule Of Unrealized Losses On Investments) (Details) $ in Thousands | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 13 | 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 | $ 2,383 | $ 0
Total temporarily impaired securities, Less than 12 Months, Unrealized Losses | (53) | 0
Total temporarily impaired securities, 12 Months or Longer, Fair Value | 1,101 | 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 | 3,484 | 1,102
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (56) | (2)
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, Less than 12 Months, Fair Value | 2,633 | 8,493
Total temporarily impaired securities, Less than 12 Months, Unrealized Losses | (69) | (13)
Total temporarily impaired securities, 12 Months or Longer, Fair Value | 6,111 | 6,203
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (96) | (35)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 8,744 | 14,696
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (165) | (48)
Total temporarily impaired securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, Less than 12 Months, Fair Value | 5,016 | 8,493
Total temporarily impaired securities, Less than 12 Months, Unrealized Losses | (122) | (13)
Total temporarily impaired securities, 12 Months or Longer, Fair Value | 7,212 | 7,305
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (99) | (37)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 12,228 | 15,798
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ (221) | $ (50)

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