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Loans and ALLL (Summary of recorded investment in loans by segments) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Individually evaluated for impairment, ALLL | $ 911 | $ 1,114 |
Collectively evaluated for impairment, ALLL | 8,833 | 6,825 |
Total, ALLL | 9,744 | 7,939 | $ 8,375
Individually evaluated for impairment, Loans | 27,936 | 28,191 |
Collectively evaluated for impairment, Loans | 1,210,375 | 1,158,379 |
Total | 1,238,311 | 1,186,570 |
Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Individually evaluated for impairment, ALLL | 84 | 15 |
Collectively evaluated for impairment, ALLL | 2,078 | 1,899 |
Total, ALLL | 2,162 | 1,914 | 2,563
Individually evaluated for impairment, Loans | 9,821 | 7,865 |
Collectively evaluated for impairment, Loans | 746,865 | 693,076 |
Total | 756,686 | 700,941 |
Agricultural [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Individually evaluated for impairment, ALLL | 56 | 26 |
Collectively evaluated for impairment, ALLL | 255 | 608 |
Total, ALLL | 311 | 634 | 775
Individually evaluated for impairment, Loans | 13,796 | 14,840 |
Collectively evaluated for impairment, Loans | 86,665 | 102,080 |
Total | 100,461 | 116,920 |
Residential Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Individually evaluated for impairment, ALLL | 771 | 1,073 |
Collectively evaluated for impairment, ALLL | 592 | 974 |
Total, ALLL | 1,363 | 2,047 | 1,992
Individually evaluated for impairment, Loans | 4,319 | 5,486 |
Collectively evaluated for impairment, Loans | 303,224 | 293,083 |
Total | 307,543 | 298,569 |
Consumer [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Individually evaluated for impairment, ALLL | 0 | 0 |
Collectively evaluated for impairment, ALLL | 798 | 922 |
Total, ALLL | 798 | 922 | 857
Individually evaluated for impairment, Loans | 0 | 0 |
Collectively evaluated for impairment, Loans | 73,621 | 70,140 |
Total | 73,621 | 70,140 |
Unallocated [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Individually evaluated for impairment, ALLL | 0 | 0 |
Collectively evaluated for impairment, ALLL | 5,110 | 2,422 |
Total, ALLL | $ 5,110 | $ 2,422 | $ 2,188

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