v3.25.2
GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill and Intangible Assets by Operating Segment) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Apr. 01, 2025
Dec. 31, 2024
Apr. 01, 2024
Finite-Lived Intangible Assets [Line Items]        
Goodwill $ 1,710,912   $ 1,214,053  
Intangible Assets 351,381   84,563  
American National        
Finite-Lived Intangible Assets [Line Items]        
Goodwill     288,842 $ 288,842
Sandy Spring        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 496,859 $ 496,859    
Wholesale Banking | American National        
Finite-Lived Intangible Assets [Line Items]        
Goodwill       210,800
Wholesale Banking | Sandy Spring        
Finite-Lived Intangible Assets [Line Items]        
Goodwill   387,600    
Consumer Banking | American National        
Finite-Lived Intangible Assets [Line Items]        
Goodwill       $ 78,000
Consumer Banking | Sandy Spring        
Finite-Lived Intangible Assets [Line Items]        
Goodwill   $ 109,300    
Operating segments | Wholesale Banking        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 1,237,585   850,035  
Intangible Assets 53,159   8,714  
Operating segments | Wholesale Banking | American National        
Finite-Lived Intangible Assets [Line Items]        
Goodwill     210,800  
Intangible Assets     8,400  
Operating segments | Wholesale Banking | Sandy Spring        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 387,600      
Intangible Assets 46,300      
Operating segments | Consumer Banking        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 473,327   364,018  
Intangible Assets 697   778  
Operating segments | Consumer Banking | American National        
Finite-Lived Intangible Assets [Line Items]        
Goodwill     78,000  
Operating segments | Consumer Banking | Sandy Spring        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 109,300      
Corporate Other        
Finite-Lived Intangible Assets [Line Items]        
Goodwill 0   0  
Intangible Assets 297,525   75,071  
Corporate Other | American National        
Finite-Lived Intangible Assets [Line Items]        
Intangible Assets     $ 76,300  
Corporate Other | Sandy Spring        
Finite-Lived Intangible Assets [Line Items]        
Intangible Assets $ 244,400