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Premises and Equipment, Net (Major Classes of Premises and Equipment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Premises and equipment $ 103,860 $ 102,212
Accumulated depreciation and amortization (63,250) (60,788)
Premises and equipment, net 40,610 41,424
Land and Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Premises and equipment 6,022 6,022
Buildings and Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Premises and equipment 56,842 56,164
Furniture Fixtures Equipment and Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Premises and equipment $ 40,996 $ 40,026