Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details)

v3.24.2.u1
GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
segment
Jun. 30, 2023
USD ($)
Apr. 01, 2024
USD ($)
Dec. 31, 2023
USD ($)
Finite-Lived Intangible Assets [Line Items]            
Number of operating segments | segment     2      
Goodwill $ 1,207,484,000   $ 1,207,484,000     $ 925,211,000
Intangible Assets 95,980,000   95,980,000     19,183,000
Impairment of goodwill or intangible assets     0      
Intangible assets, amortization expense 5,995,000 $ 2,216,000 7,889,000 $ 4,494,000    
Wholesale Banking            
Finite-Lived Intangible Assets [Line Items]            
Goodwill 845,239,000   845,239,000     639,180,000
Intangible Assets 9,349,000   9,349,000     1,302,000
Consumer Banking            
Finite-Lived Intangible Assets [Line Items]            
Goodwill 362,245,000   362,245,000     286,031,000
Intangible Assets 883,000   883,000     989,000
Corporate Other            
Finite-Lived Intangible Assets [Line Items]            
Goodwill 0   0     0
Intangible Assets $ 85,748,000   $ 85,748,000     16,892,000
Core Deposits [Member] | Minimum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets, amortization period (years) 4 years   4 years      
Core Deposits [Member] | Maximum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets, amortization period (years) 10 years   10 years      
Other Intangible Assets [Member] | Minimum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets, amortization period (years) 4 years   4 years      
Other Intangible Assets [Member] | Maximum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Intangible assets, amortization period (years) 10 years   10 years      
American National            
Finite-Lived Intangible Assets [Line Items]            
Goodwill $ 282,273,000   $ 282,273,000   $ 282,273,000 $ 0
American National | Wholesale Banking            
Finite-Lived Intangible Assets [Line Items]            
Goodwill 206,100,000   206,100,000   206,100,000  
Intangible Assets 8,400,000   8,400,000      
American National | Consumer Banking            
Finite-Lived Intangible Assets [Line Items]            
Goodwill 76,200,000   76,200,000   $ 76,200,000  
American National | Corporate Other            
Finite-Lived Intangible Assets [Line Items]            
Intangible Assets $ 76,300,000   $ 76,300,000