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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Values of Derivative Financial Instruments as well as Their Classification on Statement of Financial Condition (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Jun. 30, 2023
Assets:    
Fair Value $ 80,291 $ 71,624
Liabilities:    
Fair Value 0 0
Derivatives Designated as Hedging Instruments    
Assets:    
Fair Value 80,291 71,624
Liabilities:    
Fair Value 0 0
Interest Rate Contract    
Assets:    
Fair Value 80,291 71,624
Liabilities:    
Fair Value 0 0
Interest Rate Contract | Derivatives Designated as Hedging Instruments    
Assets:    
Fair Value 80,291 71,624
Liabilities:    
Fair Value $ 0 $ 0