Quarterly report pursuant to Section 13 or 15(d)

ACQUISITIONS (Narrative) (Details)

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ACQUISITIONS (Narrative) (Details)
$ in Thousands, shares in Millions
3 Months Ended 6 Months Ended
Apr. 01, 2024
USD ($)
item
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Business Acquisition [Line Items]            
Purchase price consideration   $ 505,746        
Goodwill   1,207,484   $ 1,207,484   $ 925,211
Merger-related costs   29,778   31,652    
Wholesale Banking            
Business Acquisition [Line Items]            
Goodwill   845,239   845,239   639,180
Consumer Banking            
Business Acquisition [Line Items]            
Goodwill   362,245   362,245   286,031
American National            
Business Acquisition [Line Items]            
Conversion ratio 1.35%          
Additional shares issued | shares 14.3          
Purchase price consideration $ 505,473          
Number of branches acquired | item 26          
Goodwill $ 282,273 282,273   282,273   $ 0
Accretion expense   0 $ 5,000 5,000 $ 9,900  
Merger-related costs   24,200   25,800 $ 0  
American National | Wholesale Banking            
Business Acquisition [Line Items]            
Goodwill 206,100 206,100   206,100    
American National | Consumer Banking            
Business Acquisition [Line Items]            
Goodwill $ 76,200 $ 76,200   $ 76,200