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Accumulated Other Comprehensive Loss (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net gains | $ 41 | $ 14
Tax (expense) benefit | (522) | (877)
Net income | 1,755 | 3,151
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net income | (312) | (240)
Investment securities- with OTTI [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Interest income expense securities taxable | 50 | 49
Tax (expense) benefit | (13) | (13)
Net income | 37 | 36
Investment Securities -All Other AFS [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Net gains |  | (6)
Tax (expense) benefit |  | 2
Net income |  | (4)
Investment Securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Interest income expense securities taxable | (72) | (75)
Tax (expense) benefit | 19 | 20
Net income | (53) | (55)
Pension Plan [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Tax (expense) benefit | 96 | 73
Net income | (262) | (196)
Pension Plan [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of Unrecognized Loss [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Other expense | (358) | (269)
SERP [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Tax (expense) benefit | 12 | 7
Net income | (34) | (21)
SERP [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of Unrecognized Loss [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Other expense | (47) | (29)
SERP [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of Prior Service Costs [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Salaries and employee benefits | $ 1 | $ 1

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