v3.25.4
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Notional and Recorded Fair Values) (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Derivative [Line Items]    
Notional amount $ 40,627,000 $ 24,553,000
Derivative asset, fair value 360,000 446,000
Derivative liability, fair value 260,000 350,000
Other assets    
Derivative [Line Items]    
Derivative asset, fair value 360,000 446,000
Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value 260,000 350,000
Derivatives designated as hedging instruments    
Derivative [Line Items]    
Notional amount 11,403,000 6,218,000
Derivatives designated as hedging instruments | Other assets    
Derivative [Line Items]    
Derivative asset, fair value 86,000 93,000
Derivatives designated as hedging instruments | Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value 1,000 2,000
Derivatives designated as hedging instruments | Hedges of floating-rate assets | Cash Flow Hedging    
Derivative [Line Items]    
Notional amount 2,750,000 550,000
Derivatives designated as hedging instruments | Hedges of floating-rate assets | Other assets | Cash Flow Hedging    
Derivative [Line Items]    
Derivative asset, fair value 7,000 0
Derivatives designated as hedging instruments | Hedges of floating-rate assets | Other liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability, fair value 1,000 2,000
Derivatives designated as hedging instruments | Hedges of floating-rate liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Notional amount 0 500,000
Derivatives designated as hedging instruments | Hedges of floating-rate liabilities | Other assets | Cash Flow Hedging    
Derivative [Line Items]    
Derivative asset, fair value 0 0
Derivatives designated as hedging instruments | Hedges of floating-rate liabilities | Other liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Derivative liability, fair value 0 0
Derivatives designated as hedging instruments | Hedges of fixed-rate assets | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 7,653,000 4,668,000
Derivatives designated as hedging instruments | Hedges of fixed-rate assets | Other assets | Fair Value Hedging    
Derivative [Line Items]    
Derivative asset, fair value 79,000 93,000
Derivatives designated as hedging instruments | Hedges of fixed-rate assets | Other liabilities | Fair Value Hedging    
Derivative [Line Items]    
Derivative liability, fair value 0 0
Derivatives designated as hedging instruments | Hedges of fixed-rate liabilities | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 1,000,000 500,000
Derivatives designated as hedging instruments | Hedges of fixed-rate liabilities | Other assets | Fair Value Hedging    
Derivative [Line Items]    
Derivative asset, fair value 0 0
Derivatives designated as hedging instruments | Hedges of fixed-rate liabilities | Other liabilities | Fair Value Hedging    
Derivative [Line Items]    
Derivative liability, fair value 0 0
Derivatives not designated as hedging instruments    
Derivative [Line Items]    
Notional amount 29,224,000 18,335,000
Derivatives not designated as hedging instruments | Other assets    
Derivative [Line Items]    
Derivative asset, fair value 274,000 353,000
Derivatives not designated as hedging instruments | Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value 259,000 348,000
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives    
Derivative [Line Items]    
Notional amount 22,428,000 16,833,000
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives | Other assets    
Derivative [Line Items]    
Derivative asset, fair value 251,000 348,000
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives | Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value 241,000 346,000
Derivatives not designated as hedging instruments | Customer commodity derivatives    
Derivative [Line Items]    
Notional amount 853,000 0
Derivatives not designated as hedging instruments | Customer commodity derivatives | Other assets    
Derivative [Line Items]    
Derivative asset, fair value 18,000 0
Derivatives not designated as hedging instruments | Customer commodity derivatives | Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value 17,000 0
Derivatives not designated as hedging instruments | Other interest rate derivatives 4    
Derivative [Line Items]    
Notional amount 5,571,000 1,105,000
Derivatives not designated as hedging instruments | Other interest rate derivatives 4 | Other assets    
Derivative [Line Items]    
Derivative asset, fair value 2,000 1,000
Derivatives not designated as hedging instruments | Other interest rate derivatives 4 | Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value 0 0
Derivatives not designated as hedging instruments | Foreign exchange derivatives    
Derivative [Line Items]    
Notional amount 308,000 373,000
Derivatives not designated as hedging instruments | Foreign exchange derivatives | Other assets    
Derivative [Line Items]    
Derivative asset, fair value 3,000 4,000
Derivatives not designated as hedging instruments | Foreign exchange derivatives | Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value 1,000 2,000
Derivatives not designated as hedging instruments | Purchased credit derivatives    
Derivative [Line Items]    
Notional amount 64,000 24,000
Derivatives not designated as hedging instruments | Purchased credit derivatives | Other assets    
Derivative [Line Items]    
Derivative asset, fair value 0 0
Derivatives not designated as hedging instruments | Purchased credit derivatives | Other liabilities    
Derivative [Line Items]    
Derivative liability, fair value $ 0 $ 0