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Loans and ALLL (Past due and current loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | $ 53 | $ 0
Nonaccrual | 5,319 | 6,535
Total Past Due and Nonaccrual | 6,870 | 11,405
Current | 1,277,515 | 1,175,165
Total | 1,284,385 | 1,186,570
Total commercial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 53 | 0
Nonaccrual | 1,367 | 1,621
Total Past Due and Nonaccrual | 1,986 | 2,477
Current | 797,646 | 698,464
Total | 799,632 | 700,941
Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 53 | 0
Nonaccrual | 28 | 390
Total Past Due and Nonaccrual | 178 | 559
Current | 503,862 | 509,594
Total | 504,040 | 510,153
Commercial other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 1,339 | 1,231
Total Past Due and Nonaccrual | 1,808 | 1,918
Current | 247,017 | 153,347
Total | 248,825 | 155,265
Commercial Advances to Mortgage Brokers Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccrual | 0 | 0
Current | 46,767 | 35,523
Total | 46,767 | 35,523
Total agricultural [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 3,656 | 4,285
Total Past Due and Nonaccrual | 4,455 | 4,285
Current | 98,707 | 112,635
Total | 103,162 | 116,920
Agricultural real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 3,104 | 2,711
Total Past Due and Nonaccrual | 3,903 | 2,711
Current | 68,476 | 77,316
Total | 72,379 | 80,027
Agricultural other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 552 | 1,574
Total Past Due and Nonaccrual | 552 | 1,574
Current | 30,231 | 35,319
Total | 30,783 | 36,893
Total residential real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 296 | 629
Total Past Due and Nonaccrual | 384 | 4,572
Current | 307,542 | 293,997
Total | 307,926 | 298,569
Residential real estate senior liens [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 184 | 557
Total Past Due and Nonaccrual | 258 | 4,278
Current | 270,436 | 253,894
Total | 270,694 | 258,172
Residential real estate junior liens [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccrual | 3 | 65
Current | 4,715 | 5,766
Total | 4,718 | 5,831
Residential real estate home equity lines of credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 112 | 72
Total Past Due and Nonaccrual | 123 | 229
Current | 32,391 | 34,337
Total | 32,514 | 34,566
Total Consumer [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccrual | 45 | 71
Current | 73,620 | 70,069
Total | 73,665 | 70,140
Consumer secured [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccrual | 41 | 68
Current | 70,311 | 66,547
Total | 70,352 | 66,615
Consumer Unsecured Financing Receivable [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccrual | 4 | 3
Current | 3,309 | 3,522
Total | 3,313 | 3,525
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 1,176 | 4,426
Financial Asset, 30 to 59 Days Past Due [Member] | Total commercial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 271 | 670
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 51 | 139
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 220 | 531
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Advances to Mortgage Brokers Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Total agricultural [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 799 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Agricultural real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 799 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Agricultural other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Total residential real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 88 | 3,685
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate senior liens [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 74 | 3,463
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate junior liens [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 3 | 65
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate home equity lines of credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 11 | 157
Financial Asset, 30 to 59 Days Past Due [Member] | Total Consumer [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 18 | 71
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer secured [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 14 | 68
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Unsecured Financing Receivable [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 4 | 3
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 322 | 444
Financial Asset, 60 to 89 Days Past Due [Member] | Total commercial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 295 | 186
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 46 | 30
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 249 | 156
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Advances to Mortgage Brokers Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Total agricultural [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Agricultural real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Agricultural other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Total residential real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 258
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate senior liens [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 258
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate junior liens [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate home equity lines of credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Total Consumer [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 27 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer secured [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | 27 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Unsecured Financing Receivable [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Past Due | $ 0 | $ 0

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