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Goodwill and Other Intangible Assets - Summary of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
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Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | $ 249,772 | $ 249,772
Accumulated Amortization | (111,380) | (103,160)
Net Carrying Amount | 138,392 | 146,612
Core deposit intangibles |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | 242,102 | 242,102
Accumulated Amortization | (105,930) | (97,936)
Net Carrying Amount | 136,172 | 144,166
Customer relationship intangible |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | 7,670 | 7,670
Accumulated Amortization | (5,450) | (5,224)
Net Carrying Amount | $ 2,220 | $ 2,446

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