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Investments In Securities and Fair Value (Schedule Of Unrealized Losses On Investments) (Details) $ in Thousands | Sep. 30, 2024 USD ($) segment | Dec. 31, 2023 USD ($) segment
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Debt securities, available-for-sale, unrealized loss position, number of positions | segment | 30 | 51
Government obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, less than 12 months, fair value |  | $ 1,488
Total temporarily impaired securities, less than 12 Months, unrealized losses |  | (2)
Total temporarily impaired securities, 12 months or longer, fair value |  | 0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss |  | 0
Debt securities, available-for-sale, unrealized loss position, total |  | 1,488
Debt securities, available-for-sale, unrealized loss position, accumulated loss |  | (2)
General 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 | $ 3,147 | 5,925
Total temporarily impaired securities, less than 12 Months, unrealized losses | (3) | (23)
Total temporarily impaired securities, 12 months or longer, fair value | 2,807 | 101
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (12) | (1)
Debt securities, available-for-sale, unrealized loss position, total | 5,954 | 6,026
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (15) | (24)
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 | 3,670 | 7,124
Total temporarily impaired securities, less than 12 Months, unrealized losses | (1) | (16)
Total temporarily impaired securities, 12 months or longer, fair value | 2,845 | 3,085
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (22) | (50)
Debt securities, available-for-sale, unrealized loss position, total | 6,515 | 10,209
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (23) | (66)
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, less than 12 months, fair value | 1,347 | 6,052
Total temporarily impaired securities, less than 12 Months, unrealized losses | (1) | (29)
Total temporarily impaired securities, 12 months or longer, fair value | 2,187 | 296
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (2) | (4)
Debt securities, available-for-sale, unrealized loss position, total | 3,534 | 6,348
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (3) | (33)
Total temporarily impaired securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total temporarily impaired securities, less than 12 months, fair value | 8,164 | 20,589
Total temporarily impaired securities, less than 12 Months, unrealized losses | (5) | (70)
Total temporarily impaired securities, 12 months or longer, fair value | 7,839 | 3,482
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (36) | (55)
Debt securities, available-for-sale, unrealized loss position, total | 16,003 | 24,071
Debt securities, available-for-sale, unrealized loss position, accumulated loss | $ (41) | $ (125)

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