v3.26.3
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) - USD ($)
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Derivative [Line Items]      
Notional amount $ 14,923,000,000   $ 15,349,000,000
Additional amount in excess of posted collateral required in case of breached agreements $ 0   100,000
Interest rate contracts      
Derivative [Line Items]      
Maximum length of time hedged in interest rate cash flow hedge 3 years 3 months 18 days    
Period to reclassification of cash flow hedge gain loss 12 months    
Derivative loss to be reclassified within twelve months $ 8,600,000    
Derivative loss to be reclassified within twelve months, net of tax 6,700,000    
Derivative gain or losses excluded from assessment of hedge effectiveness 0    
Amount of gain (loss) reclassified from AOCI into net income 0 $ 0  
Credit risk contracts      
Derivative [Line Items]      
Notional amount 497,000,000    
Maximum exposure under credit risk agreement assuming customer default 20,000.00   0
Credit risk derivatives, purchased at fair value 30,000.00   100,000
Credit risk derivatives, sold at fair value $ 20,000.00   $ 100,000
Credit risk contracts | Minimum      
Derivative [Line Items]      
Risk participation agreements, term 8 days    
Credit risk contracts | Maximum      
Derivative [Line Items]      
Risk participation agreements, term 19 years