Quarterly report [Sections 13 or 15(d)]

STOCKHOLDERS' EQUITY (Narrative) (Details)

v3.25.3
STOCKHOLDERS' EQUITY (Narrative) (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Apr. 01, 2025
USD ($)
shares
Oct. 21, 2024
$ / shares
shares
Jun. 30, 2025
shares
Sep. 30, 2025
USD ($)
item
$ / shares
shares
Sep. 30, 2024
USD ($)
Dec. 31, 2024
item
shares
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Preferred stock, shares authorized       500,000   500,000
Proceeds for issuance of common stock | $       $ 0 $ 227  
Number of active share repurchase programs | item       0   0
Preferred stock, shares outstanding       17,250   17,250
Sandy Spring            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Shares issued and sold     41,000,004      
Sandy Spring | Morgan Stanley & Co. LLC [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Shares issued and sold 11,338,028 9,859,155 11,338,028      
Proceeds for issuance of common stock | $ $ 385,000          
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