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Allowance for Loan Losses (Classes of Loan Portfolio by Categories) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current $ 708,784 $ 713,280
30-59 Days Past Due 2,415 3,256
60-89 Days Past Due 1,022 2,928
90 Days Past Due 1,690 1,701
Total Past Due 5,127 7,885
Total Loans 713,911 721,165
90 Days Past Due and Still Accruing      
Commercial [Member]
    
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current 98,961 102,775
30-59 Days Past Due 5   
60-89 Days Past Due    47
90 Days Past Due      
Total Past Due 5 47
Total Loans 98,966 102,822
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 374,354 379,834
30-59 Days Past Due 743   
60-89 Days Past Due    2,545
90 Days Past Due 1,064 960
Total Past Due 1,807 3,505
Total Loans 376,161 383,339
90 Days Past Due and Still Accruing      
Real estate-mortgage [Member]
    
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans    
Current 218,447 213,300
30-59 Days Past Due 1,649 3,240
60-89 Days Past Due 994 303
90 Days Past Due 626 741
Total Past Due 3,269 4,284
Total Loans 221,716 217,584
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 17,022 17,371
30-59 Days Past Due 18 16
60-89 Days Past Due 28 33
90 Days Past Due      
Total Past Due 46 49
Total Loans 17,068 17,420
90 Days Past Due and Still Accruing