v3.26.1
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Derivative [Line Items]      
Notional amount $ 15,489,000,000   $ 15,349,000,000
Additional amount in excess of posted collateral required in case of breached agreements $ 0.0   100,000
Interest rate contracts      
Derivative [Line Items]      
Maximum length of time hedged in interest rate cash flow hedge 3 years 9 months 18 days    
Period to reclassification of cash flow hedge gain loss 12 months    
Derivative gain to be reclassified within twelve months $ 2,100,000    
Derivative gain to be reclassified within twelve months, net of tax 1,600,000    
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 614,000,000    
Maximum exposure under credit risk agreement assuming customer default 0   0
Credit risk derivatives, purchased at fair value 100,000   100,000
Credit risk derivatives, sold at fair value $ 100,000   $ 100,000
Credit risk contracts | Minimum      
Derivative [Line Items]      
Risk participation agreements, term 2 months    
Credit risk contracts | Maximum      
Derivative [Line Items]      
Risk participation agreements, term 15 years