Loans (Summary of TDRs) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 93,066	$ 103,111
Commercial Loan Portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	70,785	78,823
Consumer Loan Portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	22,281	24,288
Accruing TDRs
Financing Receivable, Modifications [Line Items]
Total TDRs	62,535	67,178
Accruing TDRs | Commercial Loan Portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	45,388	46,141
Accruing TDRs | Consumer Loan Portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	17,147	21,037
Nonaccrual TDRs
Financing Receivable, Modifications [Line Items]
Total TDRs	30,531	35,933
Nonaccrual TDRs | Commercial Loan Portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	25,397	32,682
Nonaccrual TDRs | Consumer Loan Portfolio
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 5,134	$ 3,251