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Loans and Allowance for Loan Losses - Non Accruals 1 (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Jun. 30, 2020
Real estate loans    
Total $ 1,264 $ 1,330
One- to four-family [Member]    
Real estate loans    
Total 1,218 1,256
Home equity lines of credit [Member]    
Real estate loans    
Total 0 15
Real Estate Loan [Member]    
Real estate loans    
Total 1,218 1,271
Commercial [Member]    
Real estate loans    
Total   0
Commercial [Member]    
Real estate loans    
Total $ 46 59
Consumer Loans [Member]    
Real estate loans    
Total   $ 0