Annual report [Section 13 and 15(d), not S-K Item 405]

ACQUISITIONS (Consideration Transferred) (Details)

v3.25.4
ACQUISITIONS (Consideration Transferred) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 01, 2025
Apr. 01, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Business Acquisition [Line Items]          
Purchase price consideration     $ 1,275,247 $ 505,746  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]          
Total assets     12,967,058 2,946,897 $ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]          
Total liabilities     12,210,323 2,730,266 $ 0
Preliminary goodwill     1,733,287 1,214,053  
American National          
Business Acquisition [Line Items]          
Purchase price consideration   $ 505,473      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]          
Cash and cash equivalents   55,060      
Securities AFS   507,764      
LHFS   2,611      
LHFI   2,151,517      
Premises and equipment   35,802      
CDI and other intangibles   84,687      
BOLI   30,627      
Other assets   78,829      
Total assets   2,946,897      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]          
Deposits   2,583,089      
Short-term borrowings   98,336      
Long-term borrowings   25,890      
Other liabilities   22,951      
Total liabilities   2,730,266      
Fair value of net assets acquired   216,631      
Preliminary goodwill   $ 288,842 288,800 $ 288,842  
Sandy Spring          
Business Acquisition [Line Items]          
Purchase price consideration $ 1,275,969        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]          
Cash and cash equivalents 270,211        
Securities AFS 1,266,925        
Restricted Stock 68,310        
LHFI 8,603,683        
Premises and equipment 59,402        
CDI and other intangibles 290,650        
BOLI 170,482        
Lease ROU asset 40,808        
Other assets 327,797        
Total assets 12,967,058        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]          
Deposits 11,227,922        
Short-term borrowings 272,201        
Long-term borrowings 560,761        
Lease liabilities 40,808        
Other liabilities 108,631        
Total liabilities 12,210,323        
Fair value of net assets acquired 756,735        
Preliminary goodwill 519,234   $ 519,234    
Sandy Spring | CRE          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]          
LHFS 1,839,638        
Sandy Spring | Non-CRE          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]          
LHFS $ 29,152