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Equity (Details) - $ / shares
Feb. 09, 2024
Nov. 13, 2023
Aug. 14, 2023
May 15, 2023
Feb. 28, 2023
Jan. 24, 2023
Subsequent Event [Line Items]            
Cash dividends declared per common share (usd per share)   $ 0.36 $ 0.36 $ 0.36   $ 0.35
Umpqua Bank and Columbia Banking System Merger            
Subsequent Event [Line Items]            
Business Acquisition, Equity Interest Issued or Issuable, Share Exchange Ratio         0.5958  
Subsequent Event            
Subsequent Event [Line Items]            
Cash dividends declared per common share (usd per share) $ 0.36