Loans (Summary of TDRs) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Schedule of corporation's TDRs
Total TDRs	$ 98,988	$ 101,322	$ 100,577
Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	74,398	77,047	76,952
Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	24,590	24,275	23,625
Performing [Member]
Schedule of corporation's TDRs
Total TDRs	44,803	45,664	44,588
Performing [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	27,096	29,179	28,606
Performing [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	17,707	16,485	15,982
Nonperforming [Member]
Schedule of corporation's TDRs
Total TDRs	19,113	18,467	15,444
Nonperforming [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	15,559	15,271	11,797
Nonperforming [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	3,554	3,196	3,647
Substandard Nonaccrual [Member]
Schedule of corporation's TDRs
Total TDRs	35,072	37,191	40,545
Substandard Nonaccrual [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	31,743	32,597	36,549
Substandard Nonaccrual [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	$ 3,329	$ 4,594	$ 3,996