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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024 USD ($) derivativeInstrument	Mar. 31, 2023 USD ($)	Mar. 31, 2024 USD ($) derivativeInstrument	Mar. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)
Derivative [Line Items]
Amount of gain reclassified from accumulated other comprehensive income to interest expense	$ 9,461	$ 6,461	$ 28,295	$ 12,185
Pipeline of loans held-for-sale	13,400		13,400		$ 11,700
Interest Expense
Derivative [Line Items]
Amount of gain reclassified from accumulated other comprehensive income to interest expense	$ 9,500		18,800
Estimated cash flow hedge gain (loss) to be reclassified in next twelve months			28,400
Interest Income
Derivative [Line Items]
Estimated cash flow hedge gain (loss) to be reclassified in next twelve months			$ 500
Cash Flow Hedges \| Interest Rate Swaps
Derivative [Line Items]
Number of interest rate derivative instruments held \| derivativeInstrument	12		12
Derivative, notional amount	$ 1,430,000		$ 1,430,000
Cash Flow Hedges \| Interest Rate Floor
Derivative [Line Items]
Number of interest rate derivative instruments held \| derivativeInstrument	4		4
Derivative, notional amount	$ 400,000		$ 400,000
Fair Value Hedging \| Interest Rate Swaps
Derivative [Line Items]
Number of interest rate derivative instruments held \| derivativeInstrument	5		5
Derivative, notional amount	$ 675,000		$ 675,000