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FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Details) - USD ($)	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Loans receivable	$ 5,779,181,000		$ 5,812,937,000
Financing receivable, allowance for credit losses, individually evaluated for impairment	44,723,000	$ 44,958,000	46,191,000	$ 44,455,000	$ 44,457,000	$ 44,939,000
Fair Value, Measurements, Nonrecurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net loans receivable	23,445,000		21,082,000
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net loans receivable	23,445,000		21,082,000
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	24,300,000		21,100,000
Financing receivable, allowance for credit losses, individually evaluated for impairment	886,000		1,400,000
Net loans receivable	23,400,000		22,500,000
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	$ 23,445,000		$ 21,082,000