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DERIVATIVES AND HEDGING ACTIVITIES - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Derivative asset, collateral, obligation to return cash, offset $ 0 $ 3,300
Derivative liability, collateral, right to reclaim cash, offset 5,300 16,500
Derivatives 2,277,585 2,322,816
Interest Rate Swap, Back-To-Back    
Derivative [Line Items]    
Derivatives $ 287,000 $ 246,000