Quarterly report [Sections 13 or 15(d)]

STOCKHOLDERS' EQUITY (Narrative) (Details)

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STOCKHOLDERS' EQUITY (Narrative) (Details)
$ / shares in Units, $ in Millions
 3 Months Ended
Apr. 01, 2025
USD ($)
shares
Oct. 21, 2024
$ / shares
shares
Mar. 31, 2026
item
$ / shares
shares
Dec. 31, 2025
item
shares
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Preferred stock, shares authorized     500,000 500,000
Number of active share repurchase programs | item     0 0
Preferred stock, shares outstanding     17,250 17,250
Sandy Spring | Morgan Stanley & Co. LLC [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Shares issued and sold 11,338,028 9,859,155    
Proceeds for issuance of common stock | $ $ 385.0      
Number of stocks option, granted   1,478,873    
Sandy Spring | Morgan Stanley & Co. LLC [Member] | Maximum [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Sale of price per share | $ / shares   $ 35.5    
Depositary Shares        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Number of shares to be purchased upon the exercise of options     900,000  
Preferred stock, liquidation preference (usd per share) | $ / shares     $ 25  
Preferred stock, shares outstanding     6,900,000  
Series A Preferred Stock [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Number of preferred stock represented by each depositary share     each representing a 1/400th ownership interest in a share of its Series A preferred stock  
Preferred stock, liquidation preference (usd per share) | $ / shares     $ 10,000  
Preferred stock, dividend rate     6.875%