v3.26.1
Business Combinations (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jan. 31, 2026
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Business Combination [Line Items]          
Additions as a result of acquisitions     $ 38,100    
Business Combination, Recognized Asset Acquired, Asset   $ 1,552,469 1,552,469   $ 0
Business Combination, Recognized Liability Assumed, Liability   1,405,563 1,405,563   0
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)   146,906 146,906   $ 0
Goodwill   279,029 279,029 $ 240,939  
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date     $ 174    
Heritage Financial Corporation and Olympic Bancorp Merger          
Business Combination [Line Items]          
Number of shares issued | shares 7,167,600        
Share price (in usd per share) | $ / shares $ 25.81        
Business Combination, Consideration Transferred $ 184,996        
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent 155,167        
Business Combination, Recognized Asset Acquired, Investment in Debt and Equity Securities, Current 311,979        
Business Combination, Recognized Asset Acquired, Receivable, Current 944,961        
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment 27,437        
Federal Home Loan Bank stock, at cost 999        
Business Combination, Recognized Asset Acquired, Other Asset, Current $ 19,634        
Business Acquisition, Equity Interest Issued or Issuable, Share Exchange Ratio 45.0        
Business Combination, Acquisition-Related Cost, Expense   $ 7,500      
Business Combination, Recognized Asset Acquired, Asset $ 1,552,469        
Business Combination, Recognized Liability Assumed, Other Liability, Current 16,567        
Business Combination, Recognized Liability Assumed, Liability 1,405,563        
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) 146,906        
Goodwill 38,090        
Business Combination, Recognized Identifiable Liabilities Assumed, Deposits 1,388,996        
Bank owned life insurance 37,734        
Business Combination, Recognized Asset Acquired, Accrued interest receivable $ 4,253        
Business Combination, Acquiree Price Per Share | $ / shares $ 1,161.45        
Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value $ 20,611        
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date 174        
Financing Receivable, Purchased with Credit Deterioration, Discount (Premium) (2,794)        
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price 17,643        
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Fair Value 936,500        
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Gross Contractual Amount 956,600        
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived $ 50,305