Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Location
Dec. 31, 2012
Dec. 31, 2011
Nature of Operations and Summary of Significant Accounting Policies (Textual) [Abstract]      
Number of location of banking operations 27    
Period for federal fund sold 1 day    
Maturity date of certificates of deposit 3 years    
Number of days for discontinuance of accrual of interest 90 days    
Maximum period for consumer loans charge off 180 days    
Purchase servicing rights $ 0    
Corporation recorded servicing fee revenue 737,000 757,000 732,000
Foreclosed assets included in Other Assets on the accompanying consolidated balance sheets 1,412,000 2,018,000  
Present value of the post retirement benefits payable 2,699,000 2,657,000  
Periodic policy maintenance costs 75,000 24,000 60,000
Director Plan [Member]
     
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Shares under deferred compensation plan 185,311 170,566  
Director Plan [Member] | Rabbi Trust [Member]
     
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Shares under deferred compensation plan 12,761 5,130  
Federal Deposit Insurance Corporation [Member]
     
Entity Information [Line Items]      
Carrying balance of FDIC INSURANCE PREMIUM 0 1,804,000  
Minimum [Member]
     
Property, Plant and Equipment [Line Items]      
Useful lives of the related assets 3 years    
Maximum [Member]
     
Property, Plant and Equipment [Line Items]      
Useful lives of the related assets 40 years    
Originated mortgage servicing rights [Member]
     
Mortgage Loans on Real Estate [Line Items]      
Unpaid principal balance of mortgages serviced for others 293,665,000 303,351,000  
Capitalized mortgage loans on real estate carrying amount $ 2,555,000 $ 2,285,000