Loans (Summary of TDRs) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of corporation's TDRs
Total TDRs	$ 95,292	$ 103,111
Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	72,263	78,823
Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	23,029	24,288
Performing Financial Instruments [Member]
Schedule of corporation's TDRs
Total TDRs	48,835	47,810
Performing Financial Instruments [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	30,662	29,844
Performing Financial Instruments [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	18,173	17,966
Nonperforming Financial Instruments [Member]
Schedule of corporation's TDRs
Total TDRs	16,952	19,368
Nonperforming Financial Instruments [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	15,261	16,297
Nonperforming Financial Instruments [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	1,691	3,071
Nonaccrual TDRs [Member]
Schedule of corporation's TDRs
Total TDRs	29,505	35,933
Nonaccrual TDRs [Member] | Commercial Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	26,340	32,682
Nonaccrual TDRs [Member] | Consumer Loan Portfolio [Member]
Schedule of corporation's TDRs
Total TDRs	$ 3,165	$ 3,251