Loans (Loan Balances By Classification) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	$ 2,686,491	$ 2,357,137
Total loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	2,686,491	2,357,137
Originated Loan | Total loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	2,064,717	1,942,290
Originated Loan | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	107,255	107,118
Originated Loan | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	757,767	702,565
Originated Loan | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	471,270	438,051
Originated Loan | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	299,934	304,523
Originated Loan | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	89,957	88,902
Originated Loan | Consumer, indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	373,384	340,390
Originated Loan | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	71,545	67,010
Originated Loan | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	444,929	407,400
Originated Loan | Deposit account overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	860	849
Acquired Loans | Total loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	621,774	414,847
Acquired Loans | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	14,780	8,319
Acquired Loans | Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	221,975	173,439
Acquired Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	40,938	34,493
Acquired Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	309,629	184,864
Acquired Loans | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	45,933	20,575
Acquired Loans | Consumer, indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	198	329
Acquired Loans | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	3,101	1,147
Acquired Loans | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of deferred fees and costs	$ 3,299	$ 1,476