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Goodwill and Other Intangible Assets (Carrying Value of Intangible Assets Subject to Amortization) (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Purchase Value $ 316,507 $ 285,807
Accumulated Amortization 249,436 250,583
Carrying Value 67,071 35,224
Core Deposit Intangibles [Member]    
Finite-Lived Intangible Assets [Line Items]    
Purchase Value 235,845 235,845
Accumulated Amortization 223,561 217,260
Carrying Value 12,284 18,585
Credit Card and Trust Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Purchase Value 80,662 49,962
Accumulated Amortization 25,875 33,323
Carrying Value $ 54,787 $ 16,639