Loans (Nonaccrual and Past Due Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	$ 16,202	$ 15,692
Loans 90 Days Past Due and Accruing	1,030	1,626
Originated Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	13,499	12,761
Loans 90 Days Past Due and Accruing	327	614
Originated Loan | Commercial real estate, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	732	754
Loans 90 Days Past Due and Accruing	0	0
Originated Loan | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	6,673	6,877
Loans 90 Days Past Due and Accruing	0	0
Originated Loan | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	7,405	7,631
Loans 90 Days Past Due and Accruing	0	0
Originated Loan | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1,598	739
Loans 90 Days Past Due and Accruing	0	0
Originated Loan | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	3,666	3,546
Loans 90 Days Past Due and Accruing	298	548
Originated Loan | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	507	550
Loans 90 Days Past Due and Accruing	29	50
Originated Loan | Consumer, indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	306	256
Loans 90 Days Past Due and Accruing	0	0
Originated Loan | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	17	39
Loans 90 Days Past Due and Accruing	0	16
Originated Loan | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	323	295
Loans 90 Days Past Due and Accruing	0	16
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	2,703	2,931
Loans 90 Days Past Due and Accruing	703	1,012
Acquired Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	269	192
Loans 90 Days Past Due and Accruing	71	215
Acquired Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	141	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	2,062	2,168
Loans 90 Days Past Due and Accruing	632	730
Acquired Loans | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	230	312
Loans 90 Days Past Due and Accruing	0	22
Acquired Loans | Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual Loans	1	0
Loans 90 Days Past Due and Accruing	$ 0	$ 0