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Premises and Equipment (Details) Narrative - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Feb. 28, 2023
Asset Acquisition [Line Items]        
Depreciation and Amortization on Property, Plant , and Equipment $ 28,000 $ 29,300 $ 22,900  
Umpqua Bank and Columbia Banking System Merger        
Asset Acquisition [Line Items]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment       $ 203,270