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Loans and Allowance for Credit Losses - Additional Information (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) Alternative Loan_modified | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Increase (decrease) in accounts and notes receivable | $ 88,800,000 |  |  |
Accrued interest on loans | 33,700,000 | $ 29,900,000 |  |
Minimum value of loans individually measured for impairment | $ 250,000,000 |  |  |
Number of alternatives for measuring impaired loans receivable | Alternative | 3 |  |  |
Allowance for credit losses | $ 70,182,000 | 68,675,000 | $ 59,093,000 | $ 54,655,000
Recorded balance of nonaccrual loans | 28,775,000 | 18,832,000 |  |
Interest lost on nonaccrual loans | $ 1,400,000 | 412,000 | 103,000 |
Troubled debt restructurings balance | Loan_modified | 0 |  |  |
Real estate acquired through foreclosure | $ 2,179,000 | 1,163,000 |  |
Mortgage loans secured by real estate In foreclosure | $ 2,800,000 | 399,000 |  |
Commercial Real Estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Debt coverage ratio | 1.20x |  |  |
Amortization period of loans | twenty years |  |  |
Recorded balance of nonaccrual loans | $ 7,716,000 | 10,237,000 |  |
Commercial Real Estate | Minimum |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Maximum loan-to-value ratio (in hundredths) | 65.00% |  |  |
Commercial Real Estate | Maximum |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Maximum loan-to-value ratio (in hundredths) | 80.00% |  |  |
1-4 Family Residential Properties |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Period when loans charged-down | 180 days |  |  |
Recorded balance of nonaccrual loans | $ 4,937,000 | 4,940,000 |  |
Unsecured Open-end Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Period when loans charged-down | 180 days |  |  |
Other Secured Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Period when loans charged-down | 120 days |  |  |
Agricultural |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Maximum loan-to-value ratio (in hundredths) | 65.00% |  |  |
Amortization period of loans | twenty-five years |  |  |
Loans receivable, time period | 1 year |  |  |
Agricultural | Real Estate Loan |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for credit losses | $ 1,361,000 | 1,366,000 | 1,433,000 | 1,257,000
Commercial and Industrial Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Maximum loan-to-value ratio (in hundredths) | 80.00% |  |  |
Amortization period of loans | seven years |  |  |
Loans receivable, time period | 1 year |  |  |
Percentage of increase (decrease) in qualitative factors | (10.00%) |  |  |
Allowance for credit losses | $ 25,602,000 | 25,450,000 | 20,808,000 | 19,241,000
Residential Properties | Real Estate Loan |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Maximum loan-to-value ratio (in hundredths) | 80.00% |  |  |
Amortization period of loans | twenty-five years |  |  |
Balloon period | five years |  |  |
Construction and Land Development |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Percentage of amount on net basis | 10.00% |  |  |
Construction and Land Development | Real Estate Loan |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for credit losses | $ 3,275,000 | 2,918,000 | 2,250,000 | 1,743,000
Residential Real Estate Owner Occupied Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Percentage of increase (decrease) in qualitative factors | 15.00% |  |  |
HELOC Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Percentage of increase (decrease) in qualitative factors | 15.00% |  |  |
Commercial Real Estate Owner Occupied Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Percentage of increase (decrease) in qualitative factors | (10.00%) |  |  |
Commercial Real Estate Non Owner Occupied Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Percentage of increase (decrease) in qualitative factors | 5.00% |  |  |
Agricultural Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Percentage of increase (decrease) in qualitative factors | 25.00% |  |  |
Allowance for credit losses | $ 1,957,000 | 705,000 | 585,000 | 983,000
Consumer Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Percentage of increase (decrease) in qualitative factors | 15.00% |  |  |
Allowance for credit losses | $ 1,739,000 | $ 2,258,000 | $ 2,118,000 | $ 2,855,000

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