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Goodwill and Other Intangible Assets - Schedule of Gross Carrying Amounts and Accumulated Amortization of Other Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 242,257 $ 196,132
Accumulated Amortization and Impairment (114,172) (93,882)
Net Carrying Amount 128,085 102,250
Core deposit    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 189,636 143,511
Accumulated Amortization and Impairment (89,825) (72,940)
Net Carrying Amount 99,811 70,571
Customer trust relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 52,621 52,621
Accumulated Amortization and Impairment (24,347) (20,942)
Net Carrying Amount $ 28,274 $ 31,679