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Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Schedule of Investments [Line Items] |  |
Document Period End Date | Dec. 31, 2019 |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | $ 138,967 | $ 109,807
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 1,637 | 2,032
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 36,185 | 304,628
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 584 | 12,178
Securities available-for-sale, Total, Estimated Fair Value | 175,152 | 414,435
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 2,221 | 14,210
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value |  | 28,274
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 126
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value |  | 5,960
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 168
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value | 0 | 34,234
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss |  | 294
Obligations of states and political subdivisions |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 230 | 11,837
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 272
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 1,439 | 22,068
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 6 | 780
Securities available-for-sale, Total, Estimated Fair Value | 1,669 | 33,905
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 6 | 1,052
U.S. Government agencies |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 123,289 | 84,975
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 1,247 | 1,593
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 34,746 | 282,560
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 578 | 11,398
Securities available-for-sale, Total, Estimated Fair Value | 158,035 | 367,535
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 1,825 | 12,991
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value |  | 28,274
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 126
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value |  | 5,960
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 168
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value |  | 34,234
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss |  | 294
Trust preferred securities |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 4,200 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 347 |
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0 |
Securities available-for-sale, Total, Estimated Fair Value | 4,200 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 347 |
Corporate securities |  |
Schedule of Investments [Line Items] |  |
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value | 11,248 | 12,995
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 43 | 167
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0 | 0
Securities available-for-sale, Total, Estimated Fair Value | 11,248 | 12,995
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ 43 | $ 167

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