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Accumulated Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance $ 468,363 $ 438,947 $ 396,293
Total other comprehensive (loss) income, net of tax (15,335) 16,641 9,551
Balance 505,142 468,363 438,947
Hedging Derivative Instruments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance (316) (518) (276)
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount 1,476 202 (242)
Amounts reclassified from accumulated other comprehensive income (loss) 0 0 0
Total other comprehensive (loss) income, net of tax 1,476 202 (242)
Balance 1,160 (316) (518)
Securities Available-For-Sale and Transferred Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance 14,743 873 (7,769)
Reclassification adjustment for net gains included in net income     681
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount (19,817) 14,822 10,192
Amounts reclassified from accumulated other comprehensive income (loss) 103 (952) (869)
Total other comprehensive (loss) income, net of tax (19,714) 13,870 9,323
Balance (4,971) 14,743 873
Pension And Post-Retirement Obligations [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance (12,299) (14,868) (13,236)
Reclassification adjustment for net gains included in net income     2,102
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount 2,352 1,636 (576)
Amounts reclassified from accumulated other comprehensive income (loss) 551 933 1,046
Total other comprehensive (loss) income, net of tax 2,903 2,569 470
Balance (9,396) (12,299) (14,868)
Accumulated Other Comprehensive Income (Loss) [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance 2,128 (14,513) (21,281)
Reclassification adjustment for net gains included in net income     2,783
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount (15,989) 16,660 9,374
Amounts reclassified from accumulated other comprehensive income (loss) 654 19 177
Total other comprehensive (loss) income, net of tax (15,335) 16,641 9,551
Balance $ (13,207) $ 2,128 $ (14,513)