Loans and Allowance (Non-Accrual Loan, Segregated by Class of Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 6,272	$ 8,589
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	1,281	4,782
Construction Loans [Member] | Commercial Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans		62
First Mortgage [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	3,758	2,777
Second Mortgage [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	212	273
Automobile Loan [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	64	88
Boat/RVs [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	646	470
Other [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	44	46
Commercial and Industrial [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 267	$ 91