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Loans and Allowance for Credit Losses - Loans Modified as Troubled Debt Restructurings During Period (Details) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 USD ($) Modification | Sep. 30, 2020 USD ($) Modification
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 17 | 8
Financing Receivables, Modifications during Period, Balance | $ | $ 2,267 | $ 2,723
Real Estate Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 5 | 1
Financing Receivables, Modifications during Period, Balance | $ | $ 1,746 | $ 296
Real Estate Loan | 1-4 Family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 2 | 0
Financing Receivables, Modifications during Period, Balance | $ | $ 323 | $ 0
Construction and Land Development | Real Estate Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 1 | 0
Financing Receivables, Modifications during Period, Balance | $ | $ 492 | $ 0
Agricultural | Real Estate Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 1 | 0
Financing Receivables, Modifications during Period, Balance | $ | $ 250 | $ 0
Commercial Real Estate | Real Estate Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 1 | 1
Financing Receivables, Modifications during Period, Balance | $ | $ 681 | $ 296
Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 1 | 2
Financing Receivables, Modifications during Period, Balance | $ | $ 156 | $ 88
Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 6 | 4
Financing Receivables, Modifications during Period, Balance | $ | $ 287 | $ 2,328
Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 4 | 1
Financing Receivables, Modifications during Period, Balance | $ | $ 54 | $ 11
All Other Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, Modifications during Period, Number | Modification | 1 | 0
Financing Receivables, Modifications during Period, Balance | $ | $ 24 | $ 0

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