Premises and Equipment (Equipment) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
property
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 52,980,000 $ 52,583,000  
Accumulated depreciation and amortization (29,094,000) (26,856,000)  
Premises and equipment, net 23,886,000 25,727,000  
Gain (Loss) on Disposition of Property Plant Equipment 0 0 479,000
Number of properties 1    
Property, Plant and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Depreciation, Depletion and Amortization 2,700,000 2,700,000 2,200,000
Land and land improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 3,046,000 3,019,000  
Buildings and leasehold improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 29,984,000 29,772,000  
Furniture, fixtures and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 19,950,000 19,792,000  
Software and Software Development Costs [Member]      
Property, Plant and Equipment [Line Items]      
Accumulated depreciation and amortization (3,000,000) (2,700,000)  
Depreciation, Depletion and Amortization 335,000 296,000 301,000
Capitalized Computer Software, Gross $ 3,600,000 $ 3,200,000