Loans (Nonaccrual and Past Due Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	$ 16,235	$ 15,692
Loans 90 Days Past Due and Accruing	1,885	1,626
Financial Asset Originated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	13,605	12,761
Loans 90 Days Past Due and Accruing	457	614
Financial Asset Originated [Member] | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	725	754
Loans 90 Days Past Due and Accruing	0	0
Financial Asset Originated [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	6,712	6,877
Loans 90 Days Past Due and Accruing	0	0
Financial Asset Originated [Member] | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	7,437	7,631
Loans 90 Days Past Due and Accruing	0	0
Financial Asset Originated [Member] | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,308	739
Loans 90 Days Past Due and Accruing	0	0
Financial Asset Originated [Member] | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	3,842	3,546
Loans 90 Days Past Due and Accruing	373	548
Financial Asset Originated [Member] | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	582	550
Loans 90 Days Past Due and Accruing	84	50
Financial Asset Originated [Member] | Consumer, indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	405	256
Loans 90 Days Past Due and Accruing	0	0
Financial Asset Originated [Member] | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	31	39
Loans 90 Days Past Due and Accruing	0	16
Financial Asset Originated [Member] | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	436	295
Loans 90 Days Past Due and Accruing	0	16
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	2,630	2,931
Loans 90 Days Past Due and Accruing	1,428	1,012
Acquired Loans | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0	0
Loans 90 Days Past Due and Accruing	401	0
Acquired Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	225	192
Loans 90 Days Past Due and Accruing	60	215
Acquired Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	225	192
Loans 90 Days Past Due and Accruing	461	215
Acquired Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	61	259
Loans 90 Days Past Due and Accruing	0	45
Acquired Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,970	2,168
Loans 90 Days Past Due and Accruing	965	730
Acquired Loans | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	374	312
Loans 90 Days Past Due and Accruing	0	22
Acquired Loans | Consumer, indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	0	0
Loans 90 Days Past Due and Accruing	$ 2	$ 0