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Goodwill and Other Intangible Assets - Summary of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | $ 90,162 | $ 90,162
Accumulated Amortization | (70,092) | (65,986)
Net Carrying Amount | 20,070 | 24,176
Core deposit intangibles |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | 82,492 | 82,492
Accumulated Amortization | (67,443) | (64,339)
Net Carrying Amount | 15,049 | 18,153
Customer relationship intangible |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross Carrying Amount | 7,670 | 7,670
Accumulated Amortization | (2,649) | (1,647)
Net Carrying Amount | $ 5,021 | $ 6,023

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