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Allowance for Loan Losses (Classes of Loan Portfolio by Categories) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current $ 754,289 $ 713,280
30-59 Days Past Due 3,241 3,256
60-89 Days Past Due 641 2,928
90 Days Past Due 2,676 1,701
Total Past Due 6,558 7,885
Total Loans 760,847 721,165
90 Days Past Due and Still Accruing 686   
Commercial [Member]
    
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current 115,912 102,775
30-59 Days Past Due      
60-89 Days Past Due    47
90 Days Past Due      
Total Past Due    47
Total Loans 115,912 102,822
90 Days Past Due and Still Accruing      
Commercial loans secured by real estate [Member]
    
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current 394,050 379,834
30-59 Days Past Due 936   
60-89 Days Past Due 68 2,545
90 Days Past Due 1,686 960
Total Past Due 2,690 3,505
Total Loans 396,740 383,339
90 Days Past Due and Still Accruing 686   
Real estate-mortgage [Member]
    
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current 228,118 213,300
30-59 Days Past Due 2,248 3,240
60-89 Days Past Due 554 303
90 Days Past Due 990 741
Total Past Due 3,792 4,284
Total Loans 231,910 217,584
90 Days Past Due and Still Accruing      
Consumer [Member]
    
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current 16,209 17,371
30-59 Days Past Due 57 16
60-89 Days Past Due 19 33
90 Days Past Due      
Total Past Due 76 49
Total Loans 16,285 17,420
90 Days Past Due and Still Accruing