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Loans (Details 8) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Loans
Dec. 31, 2011
Loans
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans 10 3
Trouble Debt Restructuring [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans 7 2
Pre-Modification, Outstanding Recorded Investment 4,172 6,041
Post-Modification, Outstanding Recorded Investment 4,172 6,041
Commercial, industrial, and agricultural [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans 2   
Commercial, industrial, and agricultural [Member] | Trouble Debt Restructuring [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans 2   
Pre-Modification, Outstanding Recorded Investment 1,455   
Post-Modification, Outstanding Recorded Investment 1,455 0
Commercial mortgages [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans 8 3
Commercial mortgages [Member] | Trouble Debt Restructuring [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans 5 2
Pre-Modification, Outstanding Recorded Investment 2,717 6,041
Post-Modification, Outstanding Recorded Investment 2,717 6,041
Residential real estate [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans      
Residential real estate [Member] | Trouble Debt Restructuring [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans      
Pre-Modification, Outstanding Recorded Investment      
Post-Modification, Outstanding Recorded Investment      
Consumer [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans      
Consumer [Member] | Trouble Debt Restructuring [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans      
Pre-Modification, Outstanding Recorded Investment      
Post-Modification, Outstanding Recorded Investment      
Credit cards [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans      
Credit cards [Member] | Trouble Debt Restructuring [Member]
   
Loans and Leases Receivable Disclosure [Abstract]    
Number of Loans      
Pre-Modification, Outstanding Recorded Investment      
Post-Modification, Outstanding Recorded Investment