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Disclosures about Fair Value of Assets and Liabilities - (Losses)/Recoveries Recognized on Assets Measured on Non-Recurring Basis (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Foreclosed and repossessed assets held for sale $ 0 $ 0 $ (30) $ 0
Non-recurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impaired loans (collateral-dependent) $ 0 $ 13 $ 0 $ 13