Loans (Non-Accrual Loan, Segregated by Class of Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 3,685	$ 5,144
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	929	912
First Mortgage [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	2,132	3,626
Second Mortgage [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	245	335
Automobile Loan [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	13	5
Boat/RVs [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	288	224
Other [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	2	24
Commercial and Industrial [Member] | Commercial Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 76	$ 18