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FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Details) - USD ($)	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans receivable	$ 5,791,758,000		$ 5,732,787,000
Financing receivable, allowance for credit losses, individually evaluated for impairment	44,457,000	$ 44,923,000	44,939,000	$ 44,867,000	$ 46,872,000	$ 48,734,000
Fair Value, Measurements, Nonrecurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net loans receivable	6,918,000		6,910,000
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net loans receivable	6,918,000		6,910,000
Other real estate owned	0
Significant Unobservable Inputs (Level 3) \| Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans receivable	6,900,000		6,900,000
Financing receivable, allowance for credit losses, individually evaluated for impairment	6,000		508,000
Net loans receivable	6,900,000		7,400,000
Significant Unobservable Inputs (Level 3) \| Fair Value, Measurements, Nonrecurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net loans receivable	$ 6,918,000		$ 6,910,000