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DERIVATIVES AND HEDGING ACTIVITIES - Fair Value Hedges Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
DERIVATIVES AND HEDGING ACTIVITIES        
Interest income from swap transaction     $ 0  
Fair value hedges | Designated as Hedging Instrument        
DERIVATIVES AND HEDGING ACTIVITIES        
Clearing house related to the fair value derivatives $ 278,000 $ 278,000   $ 6,500,000
Fair value hedges | Interest Rate Swaps | Designated as Hedging Instrument        
DERIVATIVES AND HEDGING ACTIVITIES        
Average fixed interest rate 4.82% 4.82%    
Mortgage loans - Amortized Cost $ 698,200,000 $ 698,200,000   729,500,000
Last-of-layer in the open hedge relationship 500,000,000.0 500,000,000.0   500,000,000.0
Basis adjustment associated with the hedge 340,000 340,000   $ 6,600,000
Interest income from swap transaction $ 634,000 $ 1,300,000