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Accumulated Other Comprehensive Income (Loss) (Reclassification adjustments) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Income before federal income tax expense | $ 11,872 | $ 14,404 | $ 15,384
Labor and Related Expense | 23,772 | 23,205 | 22,609
Federal income tax expense | (987) | (1,380) | (1,363)
NET INCOME | 10,885 | 13,024 | 14,021
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Holding Gains (Losses) on AFS Securities [Member] |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net gains (losses) on sale of AFS securities | 71 | 6 | 0
Federal income tax expense | (15) | (1) | 0
NET INCOME | 56 | 5 | 0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Pension Plan [Member] |  |  |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Labor and Related Expense | 176 | 268 | 345
Federal income tax expense | (37) | (56) | (72)
NET INCOME | $ 139 | $ 212 | $ 273

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