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Allowance for Loan Losses (Loan Portfolio Summarized by Categories) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio $ 506,197 $ 486,161
Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 116,153 102,822
Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 390,044 383,339
Pass [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 459,555 443,771
Pass [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 105,664 99,886
Pass [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 353,891 343,885
Special Mention [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 32,652 20,864
Special Mention [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 7,681 28
Special Mention [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 24,971 20,836
Substandard [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 13,512 19,918
Substandard [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 2,808 2,908
Substandard [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 10,704 17,010
Doubtful [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 478 1,608
Doubtful [Member] | Commercial [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio      
Doubtful [Member] | Commercial loans secured by real estate [Member]
   
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio $ 478 $ 1,608