Loans (Summary of TDRs) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Schedule of corporation's TDRs
Total TDRs	$ 99,428	$ 101,322	$ 104,383
Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	74,751	77,047	80,696
Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	24,677	24,275	23,687
Performing [Member]
Schedule of corporation's TDRs
Total TDRs	45,808	45,664	44,133
Performing [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	28,203	29,179	29,296
Performing [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	17,605	16,485	14,837
Nonperforming [Member]
Schedule of corporation's TDRs
Total TDRs	17,912	18,467	16,565
Nonperforming [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	14,547	15,271	11,049
Nonperforming [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	3,365	3,196	5,516
Substandard Nonaccrual [Member]
Schedule of corporation's TDRs
Total TDRs	35,708	37,191	43,685
Substandard Nonaccrual [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	32,001	32,597	40,351
Substandard Nonaccrual [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	$ 3,707	$ 4,594	$ 3,334