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Accumulated Other Comprehensive Loss (Reclassification out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Interest income on taxable investment securities | $ 880 |  |  | $ 960 |  |  | $ 2,864 | $ 3,612
Provision for income tax expense | (1,412) |  |  | (1,396) |  |  | (4,047) | (2,629)
Net income | 4,388 | $ 4,403 | $ 3,430 | 4,960 | $ 2,570 | $ 1,755 | 12,221 | 9,285
Reclassification out of Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Net income | (322) |  |  | 108 |  |  | (868) | (870)
Investment securities- with OTTI [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Provision for income tax expense | (13) |  |  | (13) |  |  | (40) | (40)
Net income | 37 |  |  | 37 |  |  | 111 | 111
Investment securities- with OTTI [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Accretable Yield in Income [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Interest income on taxable investment securities | 50 |  |  | 50 |  |  | 151 | 151
Investment securities- all other [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Provision for income tax expense |  |  |  | (154) |  |  | (41) | (167)
Net income |  |  |  | 421 |  |  | 113 | 455
Investment securities- all other [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Recognition of Gains (Losses) In Income [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Net gains |  |  |  | 575 |  |  | 154 | 622
Investment securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Net gains | (54) |  |  |  |  |  |  |
Provision for income tax expense | 11 |  |  | 20 |  |  | 40 | 201
Net income | (31) |  |  | (54) |  |  | (110) | (548)
Investment securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Interest income on taxable investment securities | 12 |  |  | (74) |  |  | (96) | (809)
Investment securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Recognized Income [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Net gains |  |  |  |  |  |  | (54) | 60
Defined Benefit Plans Adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Pension [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Provision for income tax expense | 99 |  |  | 96 |  |  | 299 | 288
Net income | (273) |  |  | (262) |  |  | (817) | (786)
Defined Benefit Plans Adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | SERP [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Provision for income tax expense | 20 |  |  | 12 |  |  | 60 | 37
Net income | (55) |  |  | (34) |  |  | (165) | (102)
Defined Benefit Plans Adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] | Pension [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Other expense | (372) |  |  | (358) |  |  | (1,116) | (1,074)
Defined Benefit Plans Adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] | SERP [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Other expense | (76) |  |  | (47) |  |  | (226) | (141)
Defined Benefit Plans Adjustments [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Prior Service Costs [Member] | SERP [Member] |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |
Salaries and employee benefits | $ 1 |  |  | $ 1 |  |  | $ 1 | $ 2

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