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Securities - Amortized Cost, Gross Unrecognized Gains and Losses and Fair Values of Securities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Jun. 30, 2021
Schedule of Available-for-sale Securities [Line Items]    
Gross Unrecognized Gains $ 44 $ 1,472
Gross Unrecognized Losses 10,217  
Amortized Cost 118,291 38,138
Securities held to maturity, estimated fair value 108,118 39,610
Collateralized Mortgage Backed Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 97,132 12,314
Gross Unrecognized Gains 0 268
Gross Unrecognized Losses 10,139  
Fair Value 86,993 12,582
Collateralized Mortgage Backed Securities [Member] | Residential Pass-Through Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost [1] 84,851  
Gross Unrecognized Gains [1] 0  
Gross Unrecognized Losses [1] 8,587  
Fair Value [1] 76,264  
Collateralized Mortgage Backed Securities [Member] | Collateralized Mortgage Obligations Excluding Pass Through Securities    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost [1] 12,281 12,314
Gross Unrecognized Gains [1] 0 268
Gross Unrecognized Losses [1] 1,552  
Fair Value [1] 10,729 12,582
Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 21,159 25,824
Gross Unrecognized Gains 44 1,204
Gross Unrecognized Losses 78  
Fair Value 21,125 27,028
Debt Securities [Member] | Obligations of State and Political Subdivisions [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 21,159 25,824
Gross Unrecognized Gains 44 1,204
Gross Unrecognized Losses 78  
Fair Value $ 21,125 $ 27,028
[1] Government-sponsored enterprises.