Loans (Loan Balances By Classification) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	$ 3,372,199	$ 3,402,940
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	100,599	106,792
Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	948,260	929,853
Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	948,260
Premium finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	117,088	114,758
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	566,597	574,007
Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	118,401	120,913
Consumer, indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	537,926	503,527
Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	81,436	79,094
Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	498	351
Total loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	3,372,199	3,402,940
Finance Leases Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, net of deferred fees and costs (b)	$ 95,643	$ 0