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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
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