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FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Details) - USD ($)
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2024
Jun. 30, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Loans receivable $ 5,767,419,000 $ 5,812,937,000    
Financing receivable, allowance for credit losses, individually evaluated for impairment 45,060,000 46,191,000 $ 44,923,000 $ 44,939,000
Fair Value, Measurements, Nonrecurring        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net loans receivable 21,025,000 21,082,000    
Significant Unobservable Inputs (Level 3)        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Net loans receivable 21,025,000 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 22,000,000.0 21,100,000    
Financing receivable, allowance for credit losses, individually evaluated for impairment 1,000,000.0 1,400,000    
Net loans receivable 21,000,000.0 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 $ 21,025,000 $ 21,082,000