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Goodwill and Other Intangible Assets - Summary of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | $ 249,772 | $ 90,162
Accumulated Amortization | (94,695) | (76,057)
Net Carrying Amount | 155,077 | 14,105
Core deposit intangibles |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | 242,102 | 82,492
Accumulated Amortization | (89,733) | (71,881)
Net Carrying Amount | 152,369 | 10,611
Customer relationship intangible |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | 7,670 | 7,670
Accumulated Amortization | (4,962) | (4,176)
Net Carrying Amount | $ 2,708 | $ 3,494

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