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PREMISES AND EQUIPMENT - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 17, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]        
Depreciation expense   $ 14,873 $ 15,510 $ 13,801
Proceeds from sales of premises and equipment $ 64,000 86,756 41 0
Net gains (losses) on disposal of premises and equipment $ 8,744 14,890 28 $ 49
Lease liabilities   25,055 29,449  
Operating lease right-of-use assets   $ 22,652 $ 26,555  
Operating lease, liability, statement of financial position [Extensible List]   Other liabilities Other liabilities  
Operating lease, right-of-use asset, statement of financial position [Extensible List]   Other assets Other assets  
Remaining lease term   4 years 11 months 4 days 6 years 1 month 2 days  
Discount rate (as a percent)   3.00% 3.10%  
Property, Plant and Equipment, Other Types        
Property, Plant and Equipment [Line Items]        
Net gains (losses) on disposal of premises and equipment   $ 6,146    
Aircraft        
Property, Plant and Equipment [Line Items]        
Proceeds from sales of premises and equipment   11,500    
Net gains (losses) on disposal of premises and equipment   $ 5,583