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v3.24.3

Acquisitions - Additional Information (Details) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 01, 2024 Centers | May 31, 2023 Office | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) shares | Sep. 30, 2023 USD ($) | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 3,504,388 | $ 3,504,388 | $ 3,504,388 | $ 3,504,388 |  | $ 3,396,086 |  | $ 3,231,636
Core deposit intangibles |  |  | 70,178 | 70,178 | 70,178 | 70,178 |  | 63,994 |  | $ 51,348
Total assets |  |  | 40,115,320 |  | 40,115,320 |  |  | 38,547,877 |  |
Loans |  |  | 22,026,455 |  | 22,026,455 |  |  | 20,848,176 |  |
Total deposits |  |  | 28,087,611 |  | 28,087,611 |  |  | $ 27,179,809 |  |
Merger related expenses |  |  | 63 | 1,104 | 4,444 | 14,855 |  |  |  |
Provision for credit losses |  |  | 0 | $ 0 | 9,066 | 18,540 |  |  |  |
Provision for credit losses on off-balance sheet credit exposures |  |  |  |  | $ 1,143 | $ 6,556 |  |  |  |
First Bancshares of Texas, Inc. [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, number of shares | shares |  |  |  |  | 3,583,370 |  |  |  |  |
Payments to acquire businesses in cash |  |  |  |  | $ 91,500 |  |  |  |  |
Goodwill |  |  | 164,800 |  | $ 164,800 |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  | $ 2,140,000 |
Loans |  |  |  |  |  |  |  |  | 1,650,000 |
Total deposits |  |  |  |  |  |  |  |  | $ 1,710,000 |
First Bancshares of Texas, Inc. [Member] | West, North and Central Texas [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Number of full-service banking offices | Office |  | 16 |  |  |  |  |  |  |  |
Lone Star State Bancshares Inc [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, number of shares | shares |  |  |  |  | 2,376,182 |  |  |  |  |
Payments to acquire businesses in cash |  |  |  |  | $ 64,100 |  |  |  |  |
Goodwill |  |  | 108,000 |  | 108,000 |  |  |  |  |
Core deposit intangibles |  |  | $ 17,700 |  | $ 17,700 |  |  |  |  |
Total assets |  |  |  |  |  |  | $ 1,380,000 |  |  |
Loans |  |  |  |  |  |  | 1,080,000 |  |  |
Total deposits |  |  |  |  |  |  | $ 1,240,000 |  |  |
Lone Star State Bancshares Inc [Member] | West Texas [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Number of full-service banking offices | Centers | 5 |  |  |  |  |  |  |  |  |

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