Loans (Details 7) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 Loans	Dec. 31, 2011 Loans
Restructured in a troubled debt
Number of Loans	10	3
Loans Balance	$ 11,621	$ 7,688
Specific Reserve	1,099	228
Commercial, industrial, and agricultural [Member]
Restructured in a troubled debt
Number of Loans	2
Loans Balance	1,420
Specific Reserve
Commercial mortgages [Member]
Restructured in a troubled debt
Number of Loans	8	3
Loans Balance	10,201	7,688
Specific Reserve	1,099	228
Residential real estate [Member]
Restructured in a troubled debt
Number of Loans
Loans Balance
Specific Reserve
Consumer [Member]
Restructured in a troubled debt
Number of Loans
Loans Balance
Specific Reserve
Credit cards [Member]
Restructured in a troubled debt
Number of Loans
Loans Balance
Specific Reserve