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Disclosures about Fair Value of Assets and Liabilities - Fair Value Measurement of Assets Recognized on Nonrecurring Basis (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Jun. 30, 2020
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed assets $ 0  
Significant Other Observable Inputs (Level 2) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed assets 0  
Non-recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed assets 170 $ 200
Non-recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreclosed assets $ 170 $ 200