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Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Combined Federal And State Income Tax Rate | 23.00% | 23.00% |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning balance | $ (14,482) | $ (5,644) |
Other comprehensive loss before reclassifications | 20,376 | (6,306) |
Amounts reclassified from other comprehensive loss | (54) | 125 |
Other Comprehensive Income (Loss), Net of Tax | 20,322 | (6,181) | $ 2,367
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | 0 | 0
Ending balance | 5,840 | (14,482) | (5,644)
Defined Benefit Pension Plans |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning balance | (5,871) | (5,033) |
Other comprehensive loss before reclassifications | (399) | (963) |
Amounts reclassified from other comprehensive loss | 0 | 125 |
Other Comprehensive Income (Loss), Net of Tax | (399) | (838) |
Ending balance | (6,270) | (5,871) | (5,033)
Unrealized Gains (Losses) on Securities Available-for-Sale |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning balance | (8,611) | (611) |
Other comprehensive loss before reclassifications | 20,775 | (5,343) |
Amounts reclassified from other comprehensive loss | (54) | 0 |
Other Comprehensive Income (Loss), Net of Tax | 20,721 | (5,343) |
Ending balance | 12,110 | (8,611) | (611)
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Other Comprehensive Income (Loss), Net of Tax | $ 20,322 | (6,181) | $ 2,367
Accounting Standards Update 2016-01 [Member] | Defined Benefit Pension Plans |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | 0 |
Accounting Standards Update 2016-01 [Member] | Unrealized Gains (Losses) on Securities Available-for-Sale |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | (2,657) |
Accounting Standards Update 2016-01 [Member] | Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  | $ (2,657) |

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