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Bank Premises and Equipment, Net (Major Classes of Bank Premises and Equipment and Total Accumulated Depreciation) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross $ 31,533 $ 34,185
Less accumulated depreciation 11,364 13,221
Bank premises and equipment, net 20,169 20,964
Land [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross 6,729 6,729
Building and improvements [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross 17,928 18,632
Furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Bank premises and equipment, gross $ 6,876 $ 8,824