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Loans and Allowance for Credit Losses - Recorded Balance of Troubled Debt Restructurings (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled Debt Restructurings Balance | $ 9,502,000 | $ 5,803,000
Financing Receivable Modifications Performing Recorded Investment | 4,373,000 | 2,701,000
Real Estate Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled Debt Restructurings Balance | 6,773,000 | 3,651,000
Financing Receivable Modifications Performing Recorded Investment | 4,313,000 | 2,528,000
Residential Properties | Real Estate Loan | 1-4 Family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled Debt Restructurings Balance | 1,603,000 | 1,905,000
Financing Receivable Modifications Performing Recorded Investment | 1,268,000 | 1,382,000
Commercial | Real Estate Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled Debt Restructurings Balance | 5,170,000 | 1,746,000
Financing Receivable Modifications Performing Recorded Investment | 3,045,000 | 1,146,000
Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled Debt Restructurings Balance | 228,000 | 669,000
Financing Receivable Modifications Performing Recorded Investment | 0 | 40,000
Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled Debt Restructurings Balance | 2,389,000 | 1,349,000
Financing Receivable Modifications Performing Recorded Investment | 58,000 | 128,000
Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Troubled Debt Restructurings Balance | 112,000 | 134,000
Financing Receivable Modifications Performing Recorded Investment | $ 2,000 | $ 5,000

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