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Non-Interest Expense (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Changes in Noncontrolling Interest [Line Items] |  |  |
Salaries and employee benefits | $ 241,022 | $ 256,966 | $ 238,885
Occupancy and equipment | 58,031 | 60,303 | 53,417
Data processing expense | 36,494 | 36,329 | 34,942
Merger and acquisition expenses | 0 | 0 | 49,594
Other operating expenses: |  |  |
Advertising | 7,097 | 8,850 | 7,974
Amortization of intangibles | 8,443 | 9,685 | 8,853
Electronic banking expense | 13,444 | 14,313 | 13,632
Directors' fees | 1,639 | 1,814 | 1,491
Due from bank service charges | 1,131 | 1,115 | 1,255
FDIC and state assessment | 15,388 | 25,530 | 8,428
Other expense | 36,963 | 32,967 | 27,905
Insurance | 3,634 | 3,567 | 3,705
Legal and accounting | 8,961 | 5,230 | 9,401
Other professional fees | 8,142 | 8,815 | 8,881
Operating supplies | 2,680 | 3,138 | 3,120
Postage | 2,060 | 2,081 | 2,078
Telephone | 1,807 | 2,160 | 1,890
Total other operating expenses | 111,389 | 119,265 | 98,789
Total non-interest expense | 446,936 | 472,863 | 475,627
Hurricane expense |  |  |
Other operating expenses: |  |  |
Other expense | $ 0 | $ 0 | $ 176

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 720 -SubTopic 35 -Name Accounting Standards Codification -Section 55 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483385/720-35-55-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 720 -SubTopic 35 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483406/720-35-50-1 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 + Details
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