Loans, Past Due And Accruing Restructured (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Total non-accrual loans	$ 2,845	$ 2,951
Past-due 90 days or more and still accruing	177	149
Total non-accrual and past-due 90 days or more and still accruing	3,022	3,100
Accruing restructured loans	8,136	10,516
Total	11,158	13,616
Commercial and industrial [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Total non-accrual loans	0	0
Commercial Secured By Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Total non-accrual loans	1,983	1,767
Agricultural [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Total non-accrual loans	0	177
Residential Real Estate [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Total non-accrual loans	862	1,007
Consumer [Member]
Financing receivables, non accruals, past due, and accruing restructured loans [Line Items]
Total non-accrual loans	$ 0	$ 0