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Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement of Comprehensive Income [Abstract] |  |  |
Net Income | $ 37,475 | $ 36,279 | $ 29,326
Other Comprehensive Income (Loss), Net of Tax: |  |  |
Unrealized Net Securities Holding Gains (Losses) Arising During the Year | 4,162 | (2,116) | (940)
Reclassification Adjustment for Net Securities Losses Included in Net Income | 0 | 0 | 337
Net Retirement Plan Gain (Loss) | 2,614 | (2,833) | 214
Net Retirement Plan Prior Service Cost | 0 | (338) | 0
Amortization of Net Retirement Plan Actuarial Loss | 510 | 242 | 362
Amortization of Net Retirement Plan Actuarial Loss | 167 | 80 | (8)
Other Comprehensive Income (Loss) | 7,453 | (4,965) | (35)
Comprehensive Income | $ 44,928 | $ 31,314 | $ 29,291

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