Quarterly report [Sections 13 or 15(d)]

GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill and Intangible Assets by Operating Segment) (Details)

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GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill and Intangible Assets by Operating Segment) (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Apr. 01, 2024
Finite-Lived Intangible Assets [Line Items]      
Goodwill $ 1,214,053 $ 1,214,053  
Intangible Assets 79,165 84,563  
American National      
Finite-Lived Intangible Assets [Line Items]      
Goodwill 288,800   $ 288,842
Wholesale Banking | American National      
Finite-Lived Intangible Assets [Line Items]      
Goodwill     210,800
Consumer Banking | American National      
Finite-Lived Intangible Assets [Line Items]      
Goodwill     $ 78,000
Operating segments | Wholesale Banking      
Finite-Lived Intangible Assets [Line Items]      
Goodwill 850,035 850,035  
Intangible Assets 8,410 8,714  
Operating segments | Consumer Banking      
Finite-Lived Intangible Assets [Line Items]      
Goodwill 364,018 364,018  
Intangible Assets 737 778  
Corporate Other      
Finite-Lived Intangible Assets [Line Items]      
Goodwill 0 0  
Intangible Assets $ 70,018 $ 75,071