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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance $ 148,580 $ 164,549 $ 138,138 $ 182,836
Credit loss expense     5,000  
Net current period other comprehensive income/(loss) (8,285) (19,919) 1,737 (42,318)
Ending balance 148,171 145,723 148,171 145,723
Unrealized Gains and Losses on Available-for-Sale Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (50,800) (23,666) (60,430) (1,072)
Other comprehensive income/(loss) before reclassification, net (8,677) (20,114) (3,960) (42,708)
Credit loss expense     5,000  
Less amounts reclassified from accumulated other comprehensive income     (87)  
Net current period other comprehensive income/(loss) (8,677) (20,114) 953 (42,708)
Ending balance (59,477) (43,780) (59,477) (43,780)
Amortization of Defined Benefit Pension        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (7,494) (2,308) (7,889) (2,506)
Other comprehensive income/(loss) before reclassification, net 395 206 790 412
Less amounts reclassified from accumulated other comprehensive income   8   16
Net current period other comprehensive income/(loss) 395 198 790 396
Ending balance (7,099) (2,110) (7,099) (2,110)
Deferred Compensation Liability        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 120 132 123 135
Other comprehensive income/(loss) before reclassification, net (3) (3) (6) (6)
Net current period other comprehensive income/(loss) (3) (3) (6) (6)
Ending balance 117 129 117 129
Accumulated Other Comprehensive Income (Loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (58,174) (25,842) (68,196) (3,443)
Other comprehensive income/(loss) before reclassification, net (8,285) (19,911) (3,176) (42,302)
Credit loss expense     5,000  
Less amounts reclassified from accumulated other comprehensive income   8 (87) 16
Net current period other comprehensive income/(loss) (8,285) (19,919) 1,737 (42,318)
Ending balance $ (66,459) $ (45,761) $ (66,459) $ (45,761)