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Business Combinations - Additional Information (Details) - USD ($) |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 14, 2022 | Jun. 30, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |  |
Common stock, par value (in dollars per share) |  | $ 4 | $ 4
Delta Bancshare Company |  |  |
Business Acquisition [Line Items] |  |  |
Percentage of issued and outstanding shares acquired | 100.00% |  |
Common stock, par value (in dollars per share) | $ 10.00 |  |
Share Price | $ 4.00 |  |
Consideration paid in cash | $ 15,150,000 |  |
Consideration paid in shares | 2,292,270 |  |
Goodwill acquired during period | $ 28,200,000 |  |
Pre-tax of acquisition costs |  | $ 2,600,000 |
Pre-tax of acquisition costs |  |  | $ 2,100,000
Loans | 418,509,000 |  |
Accreted to interest income over the remaining term of loans | 8,200,000 |  |
Elimination of deferred fees and unearned discounts previously recorded by Jefferson Bank |  | $ 300,000 |
Allowance for credit losses for loans identified as PCD | 863,000 |  |
Change in acquired time deposits | 560,378,000 |  |
Change in FHLB advances | 45,075,000 |  |
Delta Bancshare Company | Core Deposit Intangibles |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset fair value | $ 5,920,000 |  |
Intangible asset estimated useful life | 10 years |  |
Delta Bancshare Company | Fair Value Adjustments |  |  |
Business Acquisition [Line Items] |  |  |
Loans | $ (7,924,000) |  |
Change in acquired time deposits | 1,759,000 |  |
Change in FHLB advances | 75,000 |  |
Delta Bancshare Company | Fair Value Adjustments | Core Deposit Intangibles |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset fair value | 5,920,000 |  |
Delta Bancshare Company | Acquired Book Value |  |  |
Business Acquisition [Line Items] |  |  |
Loans | 426,433,000 |  |
Purchased credit deteriorated loans | 18,800,000 |  |
Change in acquired time deposits | 558,619,000 |  |
Change in FHLB advances | 45,000,000 |  |
Delta Bancshare Company | Acquired Book Value | Core Deposit Intangibles |  |  |
Business Acquisition [Line Items] |  |  |
Intangible asset fair value | $ 0 |  |

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