Loans (Summary of TDRs) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of corporation's TDRs
Total TDRs	$ 48,566	$ 44,452
Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	29,665	19,440
Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	18,901	25,012
Performing [Member]
Schedule of corporation's TDRs
Total TDRs	31,369	20,394
Performing [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	15,789	4,765
Performing [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	15,580	15,629
Nonperforming [Member]
Schedule of corporation's TDRs
Total TDRs	17,197	24,058
Nonperforming [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	13,876	14,675
Nonperforming [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	$ 3,321	$ 9,383