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Non-Interest Expense - Components of Non-Interest Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023
Noninterest Expense [Abstract] |  |  |  |  |
Salaries and employee benefits | $ 60,427 | $ 64,534 | $ 121,337 |  | $ 129,024
Occupancy and equipment | 14,408 | 14,923 | 28,959 |  | 29,875
Data processing expense | 8,935 | 9,151 | 18,082 |  | 18,119
Other operating expenses: |  |  |  |  |
Advertising | 1,692 | 2,098 | 3,346 |  | 4,329
Amortization of intangibles | 2,140 | 2,478 | 4,280 | $ 4,730 | 4,955
Electronic banking expense | 3,412 | 3,675 | 6,568 |  | 7,005
Directors’ fees | 423 | 538 | 921 |  | 998
Due from bank service charges | 282 | 286 | 558 |  | 559
FDIC and state assessment | 5,494 | 3,220 | 8,812 |  | 6,720
Insurance | 905 | 927 | 1,808 |  | 1,816
Legal and accounting | 2,617 | 1,436 | 4,698 |  | 2,524
Other professional fees | 2,108 | 2,774 | 4,344 |  | 5,058
Operating supplies | 613 | 763 | 1,296 |  | 1,501
Postage | 497 | 586 | 1,020 |  | 1,087
Telephone | 444 | 573 | 914 |  | 1,101
Other expense | 8,788 | 8,320 | 17,738 |  | 16,255
Total other operating expenses | 29,415 | 27,674 | 56,303 |  | 53,908
Total non-interest expense | $ 113,185 | $ 116,282 | $ 224,681 |  | $ 230,926

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