v3.26.1
Note 2 - Business Combination (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 7 Months Ended
Jun. 01, 2025
USD ($)
shares
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
May 30, 2025
$ / shares
Dec. 31, 2024
USD ($)
Share Price (in dollars per share) | $ / shares           $ 22.97  
Goodwill   $ 220,235   $ 220,235 $ 220,235    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest   153,056 $ 82,403 154,305 154,305   $ 82,685
Business Combination, Acquisition-Related Cost, Expense   2,125 $ 1,320        
First of Long Island Corporation [Member]              
Business Acquisition, Equity Interest Issued or Issuable, Share Exchange Ratio 0.5175            
Business Combination, Consideration Transferred $ 270,828            
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares) | shares 11,790,116            
Goodwill, Measurement Period Adjustment       4,600      
Goodwill $ 11,863     $ 11,900 11,900    
Deferred Income Tax Expense (Benefit) (51,100)       (46,500)    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Asset         $ (4,600)    
Effective Income Tax Rate Reconciliation, Blended Tax Rate, Percent         30.90%    
Business Combination, Acquisition-Related Cost, Expense   2,100          
Noncash Merger Related Costs   100          
Restructuring Charges   $ 2,000          
First of Long Island Corporation [Member] | Financial Asset Acquired with Credit Deterioration [Member]              
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest $ 43,300