Loans and ALLL (Narrative) (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018 USD ($) NumberofLoan	Dec. 31, 2017 USD ($) NumberofLoan	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loan			0	0
Restructure of Loans through Forbearance of Principal or Accrued Interest | NumberofLoan	0	0
Migration analysis of loan portfolio period			5 years
Threshold period of continuous performance to return loans to accrual status			6 months
Advance in connection with impaired loans	$ 542	$ 472	$ 542	$ 472
Minimum [Member] | 4 - Low satisfactory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Delinquency period			10 days
Minimum [Member] | 5 - Special mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Delinquency period			30 days
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, amortization term			30 years
Maximum [Member] | 4 - Low satisfactory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Delinquency period			30 days
Maximum [Member] | 5 - Special mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Delinquency period			60 days
Commercial, Agricultural, and Residential Portfolio Segments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of days past due (or more), accrual of interest discontinued			90 days
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum days of consumer loan charged off			180 days
Consumer [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, amortization term			15 years
Commercial and Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percentage of loan			0.80
Commercial and Agricultural [Member] | Customer Concentration Risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum amount of loans			$ 15,000
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percentage of loan			1
Maximum percentage of principal, interest, taxes and hazard insurance on property over gross income			0.28
Maximum percentage of debt servicing over gross income			0.40
Maximum amount without corporation approval			$ 1,000
Residential, Privately Insured, Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percentage of loan			0.80