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Loans (Risk Category of Loans) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
Loans | $ 3,007,926 | $ 3,091,998 |  | $ 3,081,973
Commercial and Industrial Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 141,348 | 260,788 |  |
2020-2019 | 58,826 | 89,539 |  |
2019-2018 | 61,110 | 50,720 |  |
2018-2017 | 30,716 | 34,881 |  |
2017-2016 | 17,321 | 21,838 |  |
Prior | 51,934 | 55,896 |  |
Revolving Loans Amortized Cost Basis | 131,750 | 125,111 |  |
Loans | 493,005 | 638,773 | $ 534,692 | 589,758
Commercial Real Estate Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 406,528 | 297,148 |  |
2020-2019 | 264,011 | 225,718 |  |
2019-2018 | 172,601 | 196,096 |  |
2018-2017 | 147,700 | 208,884 |  |
2017-2016 | 157,144 | 182,886 |  |
Prior | 355,996 | 326,784 |  |
Revolving Loans Amortized Cost Basis | 26,697 | 29,881 |  |
Loans | 1,530,677 | 1,467,397 | 1,500,247 | 1,495,862
Agricultural Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 46,224 | 61,323 |  |
2020-2019 | 50,447 | 35,433 |  |
2019-2018 | 28,048 | 34,790 |  |
2018-2017 | 27,597 | 42,363 |  |
2017-2016 | 31,811 | 29,875 |  |
Prior | 84,741 | 80,213 |  |
Revolving Loans Amortized Cost Basis | 89,282 | 92,189 |  |
Loans | 358,150 | 376,186 | 384,654 | $ 384,526
Leases |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 19,689 | 18,258 |  |
2020-2019 | 12,706 | 17,517 |  |
2019-2018 | 12,990 | 9,176 |  |
2018-2017 | 5,599 | 5,415 |  |
2017-2016 | 2,473 | 1,605 |  |
Prior | 1,888 | 3,693 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 55,345 | 55,664 | $ 57,257 |
Pass | Commercial and Industrial Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 141,133 | 260,027 |  |
2020-2019 | 57,477 | 88,273 |  |
2019-2018 | 60,883 | 46,681 |  |
2018-2017 | 29,005 | 31,612 |  |
2017-2016 | 15,936 | 21,025 |  |
Prior | 48,559 | 48,508 |  |
Revolving Loans Amortized Cost Basis | 122,377 | 109,228 |  |
Loans | 475,370 | 605,354 |  |
Pass | Commercial Real Estate Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 404,175 | 296,265 |  |
2020-2019 | 264,011 | 215,226 |  |
2019-2018 | 164,204 | 179,129 |  |
2018-2017 | 131,746 | 183,703 |  |
2017-2016 | 139,788 | 171,016 |  |
Prior | 336,066 | 295,641 |  |
Revolving Loans Amortized Cost Basis | 26,697 | 29,634 |  |
Loans | 1,466,687 | 1,370,614 |  |
Pass | Agricultural Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 44,510 | 49,242 |  |
2020-2019 | 45,101 | 25,449 |  |
2019-2018 | 22,482 | 31,285 |  |
2018-2017 | 24,187 | 32,368 |  |
2017-2016 | 24,325 | 22,702 |  |
Prior | 71,268 | 64,890 |  |
Revolving Loans Amortized Cost Basis | 81,011 | 75,871 |  |
Loans | 312,884 | 301,807 |  |
Pass | Leases |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 19,689 | 18,258 |  |
2020-2019 | 12,706 | 17,517 |  |
2019-2018 | 12,990 | 9,176 |  |
2018-2017 | 5,599 | 5,415 |  |
2017-2016 | 2,473 | 1,605 |  |
Prior | 1,888 | 3,693 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 55,345 | 55,664 |  |
Special Mention | Commercial and Industrial Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 115 | 618 |  |
2020-2019 | 128 | 1,102 |  |
2019-2018 | 227 | 2,756 |  |
2018-2017 | 649 | 1,739 |  |
2017-2016 | 7 | 206 |  |
Prior | 918 | 1,972 |  |
Revolving Loans Amortized Cost Basis | 1,510 | 9,948 |  |
Loans | 3,554 | 18,341 |  |
Special Mention | Commercial Real Estate Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 2,279 | 883 |  |
2020-2019 | 0 | 9,361 |  |
2019-2018 | 710 | 15,232 |  |
2018-2017 | 14,426 | 23,489 |  |
2017-2016 | 17,356 | 7,578 |  |
Prior | 13,916 | 20,294 |  |
Revolving Loans Amortized Cost Basis | 0 | 147 |  |
Loans | 48,687 | 76,984 |  |
Special Mention | Agricultural Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 1,714 | 11,503 |  |
2020-2019 | 5,346 | 9,911 |  |
2019-2018 | 5,503 | 3,111 |  |
2018-2017 | 3,025 | 8,767 |  |
2017-2016 | 6,438 | 2,707 |  |
Prior | 6,624 | 10,125 |  |
Revolving Loans Amortized Cost Basis | 8,271 | 16,318 |  |
Loans | 36,921 | 62,442 |  |
Special Mention | Leases |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 0 | 0 |  |
2020-2019 | 0 | 0 |  |
2019-2018 | 0 | 0 |  |
2018-2017 | 0 | 0 |  |
2017-2016 | 0 | 0 |  |
Prior | 0 | 0 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 0 | 0 |  |
Substandard | Commercial and Industrial Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 100 | 143 |  |
2020-2019 | 1,221 | 164 |  |
2019-2018 | 0 | 1,283 |  |
2018-2017 | 1,062 | 1,530 |  |
2017-2016 | 1,378 | 607 |  |
Prior | 2,457 | 5,416 |  |
Revolving Loans Amortized Cost Basis | 7,863 | 5,935 |  |
Loans | 14,081 | 15,078 |  |
Substandard | Commercial Real Estate Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 74 | 0 |  |
2020-2019 | 0 | 1,131 |  |
2019-2018 | 7,687 | 1,735 |  |
2018-2017 | 1,528 | 1,692 |  |
2017-2016 | 0 | 4,292 |  |
Prior | 6,014 | 10,849 |  |
Revolving Loans Amortized Cost Basis | 0 | 100 |  |
Loans | 15,303 | 19,799 |  |
Substandard | Agricultural Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 0 | 578 |  |
2020-2019 | 0 | 73 |  |
2019-2018 | 63 | 394 |  |
2018-2017 | 385 | 1,228 |  |
2017-2016 | 1,048 | 4,466 |  |
Prior | 6,849 | 5,198 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 8,345 | 11,937 |  |
Substandard | Leases |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 0 | 0 |  |
2020-2019 | 0 | 0 |  |
2019-2018 | 0 | 0 |  |
2018-2017 | 0 | 0 |  |
2017-2016 | 0 | 0 |  |
Prior | 0 | 0 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 0 | 0 |  |
Doubtful | Commercial and Industrial Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 0 | 0 |  |
2020-2019 | 0 | 0 |  |
2019-2018 | 0 | 0 |  |
2018-2017 | 0 | 0 |  |
2017-2016 | 0 | 0 |  |
Prior | 0 | 0 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 0 | 0 |  |
Doubtful | Commercial Real Estate Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 0 | 0 |  |
2020-2019 | 0 | 0 |  |
2019-2018 | 0 | 0 |  |
2018-2017 | 0 | 0 |  |
2017-2016 | 0 | 0 |  |
Prior | 0 | 0 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 0 | 0 |  |
Doubtful | Agricultural Loans |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 0 | 0 |  |
2020-2019 | 0 | 0 |  |
2019-2018 | 0 | 0 |  |
2018-2017 | 0 | 0 |  |
2017-2016 | 0 | 0 |  |
Prior | 0 | 0 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | 0 | 0 |  |
Doubtful | Leases |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |
2021-2020 | 0 | 0 |  |
2020-2019 | 0 | 0 |  |
2019-2018 | 0 | 0 |  |
2018-2017 | 0 | 0 |  |
2017-2016 | 0 | 0 |  |
Prior | 0 | 0 |  |
Revolving Loans Amortized Cost Basis | 0 | 0 |  |
Loans | $ 0 | $ 0 |  |

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