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Acquisition Activity - Summary of Acquisition Activity (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Total Assets | $ 2,103,301 |  |  |
Total Loans | 1,493,383 |  |  |
Goodwill | 81,517 | $ 81,517 | $ 58,488 | $ 58,488
Core Deposit Intangible | 18,267 |  |  |
Total Deposits | 1,727,201 |  |  |
Statewide Bank |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total Assets | 188,026 |  |  |
Total Loans | 110,415 |  |  |
Goodwill | 560 |  |  |
Core Deposit Intangible | 1,429 |  |  |
Total Deposits | 206,925 |  |  |
GS Financial Corporation |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total Assets | 256,677 |  |  |
Total Loans | 182,440 |  |  |
Goodwill | 296 |  |  |
Core Deposit Intangible | 859 |  |  |
Total Deposits | 193,518 |  |  |
Britton & Koontz Capital Corporation |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total Assets | 298,930 |  |  |
Total Loans | 161,581 |  |  |
Goodwill | 43 |  |  |
Core Deposit Intangible | 3,030 |  |  |
Total Deposits | 216,600 |  |  |
Louisiana Bancorp, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total Assets | 352,897 |  |  |
Total Loans | 281,583 |  |  |
Goodwill | 8,454 |  |  |
Core Deposit Intangible | 1,586 |  |  |
Total Deposits | 208,670 |  |  |
St. Martin Bancshares, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total Assets | 592,852 |  |  |
Total Loans | 439,872 |  |  |
Goodwill | 49,135 |  |  |
Core Deposit Intangible | 6,766 |  |  |
Total Deposits | 533,497 |  |  |
Friendswood Capital Corporation |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total Assets | 413,919 |  |  |
Total Loans | 317,492 |  |  |
Goodwill | 23,029 |  |  |
Core Deposit Intangible | 4,597 |  |  |
Total Deposits | $ 367,991 |  |  |

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