Loans and Allowance (Non-Accrual Loan, Segregated by Class of Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 5,144	$ 6,904
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	912	2,356
First Mortgage [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	3,626	3,592
Second Mortgage [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	335	783
Automobile Loan [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	5
Boat/RVs [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	224	81
Other [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	24	67
Commercial and Industrial [Member] | Commercial Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 18	$ 25