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Loans and Allowance for Credit Losses - Additional Information (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 USD ($) Alternative Loan_modified | Dec. 31, 2021 USD ($) Loan_modified | Dec. 31, 2020 USD ($) | Jan. 01, 2020 USD ($) | Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Increase (decrease) in accounts and notes receivable | $ 828,700,000 |  |  |  |
Accrued interest on loans | 23,000,000.0 | $ 14,700,000 |  |  |
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 | $ 59,093,000 | 54,655,000 | $ 41,910,000 |  | $ 26,911,000
Recorded balance of nonaccrual loans | 15,956,000 | 18,105,000 |  |  |
Interest lost on nonaccrual loans | 103,000 | 308,000 | 921,000 |  |
Troubled debt restructurings balance | 5,064,000 | 5,792,000 |  |  |
Loans receivable, modifications, allowance | $ 500,000 | $ 800,000 |  |  |
Troubled debt restructurings balance | Loan_modified | 2 | 1 |  |  |
Real estate acquired through foreclosure | $ 4,261,000 | $ 4,984,000 |  |  |
Mortgage loans secured by real estate In foreclosure | $ 425,000 | 411,000 |  |  |
ASU 2016-13 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | $ 28,583,000 |
ASU 2016-13 | Revision of Prior Period, Adjustment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 1,672,000 |
ASU 2016-13 | Financial Asset Acquired with Credit Deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 1,198,000 |
ASU 2016-13 | Financial Asset Acquired with Credit Deterioration | Revision of Prior Period, Adjustment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 833,000 |
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 | $ 7,640,000 | 7,920,000 |  |  |
Commercial Real Estate | ASU 2016-13 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 11,739,000 |
Commercial Real Estate | ASU 2016-13 | Revision of Prior Period, Adjustment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 541,000 |
Commercial Real Estate | ASU 2016-13 | Financial Asset Acquired with Credit Deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 818,000 |
Commercial Real Estate | ASU 2016-13 | Financial Asset Acquired with Credit Deterioration | Revision of Prior Period, Adjustment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 459,000 |
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 | $ 4,943,000 | 5,252,000 |  |  |
1-4 Family Residential Properties | ASU 2016-13 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 2,142,000 |
1-4 Family Residential Properties | ASU 2016-13 | Revision of Prior Period, Adjustment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 756,000 |
1-4 Family Residential Properties | ASU 2016-13 | Financial Asset Acquired with Credit Deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | 48,000 |
1-4 Family Residential Properties | ASU 2016-13 | Financial Asset Acquired with Credit Deterioration | Revision of Prior Period, Adjustment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses |  |  |  | $ 42,000 |
Jefferson Bank |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans acquired amount | 426,400,000 |  |  |  |
Real Estate Loan |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Troubled debt restructurings balance | $ 4,435,000 | 4,953,000 |  |  |
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 | one year |  |  |  |
Agricultural | Real Estate Loan |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses | $ 1,433,000 | 1,257,000 | 1,084,000 |  | 1,093,000
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 | one year |  |  |  |
Allowance for credit losses | $ 20,808,000 | 19,241,000 | $ 13,485,000 |  | $ 9,273,000
Troubled debt restructurings balance | $ 591,000 | $ 479,000 |  |  |
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 |  |  |  |

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