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Accumulated Other Comprehensive (Loss) Income (Components of Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance $ 505,142 $ 468,363 $ 438,947
Total other comprehensive (loss) income, net of tax (124,280) (15,335) 16,641
Balance 405,605 505,142 468,363
Hedging Derivative Instruments [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance 1,160 (316) (518)
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount 3,575 1,476 202
Amounts reclassified from accumulated other comprehensive (loss) income 0 0 0
Total other comprehensive (loss) income, net of tax 3,575 1,476 202
Balance 4,735 1,160 (316)
Securities Available-For-Sale and Transferred Securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance (4,971) 14,743 873
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount (123,750) (19,817) 14,822
Amounts reclassified from accumulated other comprehensive (loss) income 87 103 (952)
Total other comprehensive (loss) income, net of tax (123,663) (19,714) 13,870
Balance (128,634) (4,971) 14,743
Pension And Post-Retirement Obligations [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance (9,396) (12,299) (14,868)
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount (4,412) 2,352 1,636
Amounts reclassified from accumulated other comprehensive (loss) income 220 551 933
Total other comprehensive (loss) income, net of tax (4,192) 2,903 2,569
Balance (13,588) (9,396) (12,299)
Accumulated Other Comprehensive Income (Loss) [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance (13,207) 2,128 (14,513)
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount (124,587) (15,989) 16,660
Amounts reclassified from accumulated other comprehensive (loss) income 307 654 (19)
Total other comprehensive (loss) income, net of tax (124,280) (15,335) 16,641
Balance $ (137,487) $ (13,207) $ 2,128