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Loans and Allowance - Amortized Cost Basis Of Collateral Dependent Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | $ 55,276 |  |  |  |  |
Allowance on Collateral Dependent Loans | 201,082 | [1] | $ 130,648 | [1] | $ 99,454 | $ 80,284
Commercial and industrial loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 2,202 |  |  |  |  |
Agricultural land, production and other loans to farmers |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 780 |  |  |  |  |
Commercial real estate, non-owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 45,188 |  |  |  |  |
Commercial real estate, owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 3,539 |  |  |  |  |
Residential Real Estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 3,113 |  |  |  |  |
Allowance on Collateral Dependent Loans | 0 |  | 0 |  | 17,364 | 14,569
Home equity |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 452 |  |  |  |  |
Individuals' loans for household and other personal expenditures |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 2 |  |  |  |  |
Allowance on Collateral Dependent Loans | 0 |  | $ 0 |  | $ 5,752 | $ 4,035
Commercial Real Estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 49,507 |  |  |  |  |
Commercial Real Estate | Commercial and industrial loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Commercial Real Estate | Agricultural land, production and other loans to farmers |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 780 |  |  |  |  |
Commercial Real Estate | Commercial real estate, non-owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 45,188 |  |  |  |  |
Commercial Real Estate | Commercial real estate, owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 3,539 |  |  |  |  |
Commercial Real Estate | Residential Real Estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Commercial Real Estate | Home equity |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Commercial Real Estate | Individuals' loans for household and other personal expenditures |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Residential Real Estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 3,565 |  |  |  |  |
Residential Real Estate | Commercial and industrial loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Residential Real Estate | Agricultural land, production and other loans to farmers |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Residential Real Estate | Commercial real estate, non-owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Residential Real Estate | Commercial real estate, owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Residential Real Estate | Residential Real Estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 3,113 |  |  |  |  |
Residential Real Estate | Home equity |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 452 |  |  |  |  |
Residential Real Estate | Individuals' loans for household and other personal expenditures |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Other |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 2,204 |  |  |  |  |
Other | Commercial and industrial loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 2,202 |  |  |  |  |
Other | Agricultural land, production and other loans to farmers |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Other | Commercial real estate, non-owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Other | Commercial real estate, owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Other | Residential Real Estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Other | Home equity |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 0 |  |  |  |  |
Other | Individuals' loans for household and other personal expenditures |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Loans | 2 |  |  |  |  |
Collateral Dependent |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | 5,994 |  |  |  |  |
Collateral Dependent | Commercial and industrial loans |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | 0 |  |  |  |  |
Collateral Dependent | Agricultural land, production and other loans to farmers |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | 0 |  |  |  |  |
Collateral Dependent | Commercial real estate, non-owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | 5,561 |  |  |  |  |
Collateral Dependent | Commercial real estate, owner occupied |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | 0 |  |  |  |  |
Collateral Dependent | Residential Real Estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | 356 |  |  |  |  |
Collateral Dependent | Home equity |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | 77 |  |  |  |  |
Collateral Dependent | Individuals' loans for household and other personal expenditures |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Allowance on Collateral Dependent Loans | $ 0 |  |  |  |  |
[1] | Beginning January 1, 2021, the calculation is based on the current expected credit loss methodology. Prior to January 1, 2021, the calculation is based on the incurred loss methodology. See additional details in NOTE 1. GENERAL of these Notes to Consolidated Condensed Financial Statement.

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