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Bank Premises and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Property Plant and Equipment Information [Abstract]      
Total bank premises and equipment $ 138,110 $ 133,866  
Accumulated depreciation and amortization (104,104) (101,310)  
Total 34,007 32,556  
Depreciation and amortization expense 4,100 4,100 $ 4,200
Occupancy expense of the Bank's premises included rental expense 8,165 8,213 $ 8,128
Land [Member]      
Property Plant and Equipment Information [Abstract]      
Total bank premises and equipment 2,444 2,426  
Buildings [Member]      
Property Plant and Equipment Information [Abstract]      
Total bank premises and equipment 36,347 36,260  
Furniture, Fixtures and Equipment [Member]      
Property Plant and Equipment Information [Abstract]      
Total bank premises and equipment 62,901 60,320  
Leasehold Improvements [Member]      
Property Plant and Equipment Information [Abstract]      
Total bank premises and equipment $ 36,418 $ 34,860