v3.25.2
Federal Home Loan Bank Advances and Other Borrowings - Additional Information (Detail) - USD ($)
12 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2024
Federal Home Loan Bank, Advances [Line Items]      
Federal Home Loan Bank advances $ 54,124,000 $ 54,124,000 $ 32,999,000
Mortgage loans secured for Federal Home Loan Bank Advances 415,223,000 415,223,000 408,196,000
Other borrowings 0 0 25,250,000
Maximum amount of outstanding agreements   18,954,000 18,377,000
Repurchase agreement monthly average amount   18,337,000 16,276,000
Repurchase agreements 18,795,000 18,795,000 17,772,000
Maturity Overnight [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Repurchase agreements 18,795,000 18,795,000  
Fed Funds Line Of Credit Facility From Cibc Bank Usa [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Line of credit maximum borrowing capacity 10,000,000 10,000,000  
Lines of credit $ 0 0 $ 0
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit One [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Debt Instrument Maturity Date May 06, 2026    
Letters of Credit Outstanding, Amount $ 80,000,000 80,000,000  
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit Two [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Debt Instrument Maturity Date Nov. 29, 2025    
Letters of Credit Outstanding, Amount $ 6,500,000 6,500,000  
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit Three [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Debt Instrument Maturity Date Nov. 29, 2025    
Letters of Credit Outstanding, Amount $ 11,000,000 11,000,000  
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit Four [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Debt Instrument Maturity Date Dec. 29, 2025    
Letters of Credit Outstanding, Amount $ 9,000,000 $ 9,000,000  
Letter of Credit [Member] | Public Deposit Unit Letter Of Credit One Two Three And Four [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage 0.065% 0.065%  
Letter of Credit [Member] | Public Deposit Unit Letter Of Credit [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage     0.065%
Letters of Credit Outstanding, Amount     $ 116,500,000
Federal Reserve Bank Advances [Member] | Asset Pledged as Collateral [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Debt Instrument, Face Amount $ 35,251,000 $ 35,251,000  
Federal Reserve Bank Advances [Member] | Debt Instrument, Redemption, Period One [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Other borrowings $ 0 $ 0 $ 25,250,000
Maximum [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Federal Home Loan Bank advances interest rate range from 4.93% 4.93%  
Minimum [Member]      
Federal Home Loan Bank, Advances [Line Items]      
Federal Home Loan Bank advances interest rate range from 0.00% 0.00%