XML 109 R93.htm IDEA: XBRL DOCUMENT v3.24.0.1
Premises and Equipment (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Feb. 28, 2023
Asset Acquisition [Line Items]        
Depreciation and Amortization expense $ 29,300 $ 22,900 $ 25,700  
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