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Goodwill and Other Intangible Assets - Summary of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Balance of intangible assets, Gross CDI Carrying Amount, Beginning of period | $ 97,211 | $ 97,211
Balance of intangible assets, Gross CDI Carrying Amount, End of period | 97,211 | 97,211
Balance of intangible assets, Accumulated Amortization, Beginning of period | (81,921) | (75,470)
Amortization | (5,324) | (6,451)
Balance of intangible assets, Accumulated Amortization, End of period | (87,245) | (81,921)
Balance of intangible assets, Net CDI Amount, Beginning of period | 15,291 | 21,742
Amortization | (5,324) | (6,451)
Balance of intangible assets, Net CDI Amount, End of period | 9,967 | 15,291
Estimated Amortization Expense: |  |
2025 | 4,193 |
2026 | 2,822 |
2027 | 1,397 |
2028 | 547 |
2029 | 356 |
Thereafter | 652 |
Total | $ 9,967 | $ 15,291

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