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Loans and Allowance for Loan Losses - Amortized Cost Basis of Loans on Nonaccrual Status and Nonaccrual Loans Individually Evaluated (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | $ 15,441 |
Financing Receivable, Nonaccrual | 19,805 | $ 25,118
Construction and Land Development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 164 |
Financing Receivable, Nonaccrual | 164 | 41
Agricultural Real Estate Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 356 |
Financing Receivable, Nonaccrual | 356 | 479
1-4 Family Residential Properties |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 7,313 |
Financing Receivable, Nonaccrual | 7,600 | 7,379
Multifamily Residential Properties |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 2,196 |
Financing Receivable, Nonaccrual | 2,196 | 3,137
Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 2,258 |
Financing Receivable, Nonaccrual | 3,690 | 4,351
Loans Secured by Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 12,287 |
Financing Receivable, Nonaccrual | 14,006 | 15,387
Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 881 |
Financing Receivable, Nonaccrual | 881 | 769
Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 1,900 |
Financing Receivable, Nonaccrual | 4,545 | 8,441
Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 373 |
Financing Receivable, Nonaccrual | $ 373 | $ 521

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