v3.26.3
Summary of Significant Accounting Policies (Details)
12 Months Ended
Jun. 30, 2026
USD ($)
Segment
shares
Jun. 30, 2025
USD ($)
shares
Jun. 30, 2024
USD ($)
Jul. 01, 2025
Summary of Significant Accounting Policies [Line Items]        
Residential loans 180 days      
Other loans 90 days      
Nonaccrual loans and loans term due 90 days      
Mortgage loans 30 years      
Private mortgage insurance, percentage 95.00%      
Borrow up percentage 90.00%      
Loan to value ratio rate 80.00%      
Estimated value percentage 80.00%      
Loans term 25 years      
Loans secured percentage 90.00%      
Loans held for sale $ 1,200,000 $ 877,000    
Amortization of mortgage servicing rights 18,000 15,000    
Mortgage servicing rights carrying value 294,000 203,000    
Total mortgage service rights 294,000 203,000    
Mortgage loans 36,700,000 25,300,000    
Servicing fees total value 70,000 54,000    
LRA held amount $ 629,000 465,000    
Total contributions   $ 67,200,000 $ 63,400,000  
Contribution percentage 5.00% 5.00%    
Total expense of contribution $ 381,000,000 $ 390,000,000    
Contribution shares | shares 110,660 110,660    
Deposit maturity term 90 days      
Operating segment | Segment 1      
Pentegra DB Plan [Member]        
Summary of Significant Accounting Policies [Line Items]        
Attainment percentage       85.50%
Contributed Employee Stock Ownership Plan ESOP [Member]        
Summary of Significant Accounting Policies [Line Items]        
Total expense of contribution $ 0 $ 0    
Contribution shares | shares 226,313 226,313    
Furniture and Fixtures [Member] | Maximum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Useful life 10 years      
Furniture and Fixtures [Member] | Minimum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Useful life 5 years      
Multi-family and Nonresidential Loans [Member]        
Summary of Significant Accounting Policies [Line Items]        
Estimated value percentage 80.00%      
Consumer Lending [Member]        
Summary of Significant Accounting Policies [Line Items]        
Estimated value percentage 80.00%      
Home Equity Loans [Member]        
Summary of Significant Accounting Policies [Line Items]        
Estimated value percentage 90.00%      
Related Party [Member]        
Summary of Significant Accounting Policies [Line Items]        
Deposits from related parties $ 2,100,000 $ 2,400,000