v3.26.3
Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Restricted Stock Units (RSUs) [Member] | First of Long Island Corporation [Member]        
Shares withheld for tax (in shares)       22,638
Restricted Stock Units (RSUs) [Member]        
Net shares issued in satisfaction of units earned, shares (in shares)   3,938 42,849 42,621
Shares withheld for tax (in shares)     49,321  
Performance Shares [Member]        
Net shares issued in satisfaction of units earned, shares (in shares)     21,164 19,577
Shares withheld for tax (in shares)     24,582  
Cash dividend declared on preferred stock, per share (in dollars per share) $ 0.328125 $ 0.328125 $ 0.984375 $ 0.984375
Cash dividends declared on common stock, per share (in dollars per share) $ 0.195 $ 0.18 $ 0.57 $ 0.54
Net forfeitures of restricted stock grants, shares (in shares) 953 1,221    
Repurchase of stock, shares (in shares) 50,000   140,000  
Net shares issued in satisfaction of units earned, shares (in shares)     42,849  
Restricted stock grants, shares (in shares)     71,484 71,768
Stock grants, shares (in shares)     1,528 1,328
Stock issued in connection with FLIC merger (in shares)       11,790,116