v3.26.1
Loans and Allowance for Credit Losses - Risk characteristics applicable to each class of the loan portfolio (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance for credit loss of individually evaluated loans $ 7.3 $ 8.2
Commercial Real Estate | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Amortization period of loans 25 years  
Term of fixed interest applicability on loans 10 years  
Multi-family real estate | Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturities of multifamily or commercial construction loans 12 months  
Multi-family real estate | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum percentage of appraised value or purchase price that loans cannot exceed 85.00%  
Amortization period of loans 25 years  
Amortization term of ballon maturity 10 years  
Maturities of multifamily or commercial construction loans 36 months  
Construction and land development | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Amortization period of loans 30 years  
Commercial and industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Amortization period of loans 5 years  
Consumer | Automobile loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum percentage of appraised value or purchase price that loans cannot exceed 100.00%  
Amortization period of loans 66 months  
Consumer | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Amortization period of loans 66 months  
Secured by real estate | 1-4 Family residential real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum percentage of appraised value or purchase price that loans cannot exceed 90.00%  
Secured by real estate | 1-4 Family residential real estate | Home Equity Loan    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of appraised value or estimated value of property 90.00%  
Term of loan 10 years  
Secured by real estate | 1-4 Family residential real estate | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Fixed-rate and adjustable-rate mortgage (ARM) loans amortization period (in years) 30 years  
Secured by real estate | Commercial Real Estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maximum percentage of appraised value or purchase price that loans cannot exceed 80.00%  
Term of variable interest applicability on loans 7 years  
Secured by real estate | Construction and land development    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Incremental period that the loan maturity can be extended to 3 months  
Secured by real estate | Construction and land development | Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturities of single-family residential construction loans 6 months  
Secured by real estate | Construction and land development | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Maturities of single-family residential construction loans 12 months  
Secured by real estate | Agriculture real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Amortization period of loans 1 year  
Agricultural real estate terms if 75% loan-to-value ratio 30 years  
Secured by real estate | Agriculture real estate | Scenario one    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loan to value percentage 80.00%  
Secured by real estate | Agriculture real estate | Scenario two    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loan to value percentage 75.00%  
Secured by real estate | Agriculture real estate | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Agricultural real estate terms if 80% loan-to-value ratio 25 years