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Benefit Plans - Schedule of Fair Value Measurements of ABRIP's Assets (Details) - Atlas Bank Retirement Income Plan ("ABRIP") - USD ($)
$ in Thousands
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]      
Prudential Guaranteed Deposit Fund $ 2,649 $ 2,717 $ 2,907
Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Prudential Guaranteed Deposit Fund 0 0  
Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Prudential Guaranteed Deposit Fund 2,649 2,717  
Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Prudential Guaranteed Deposit Fund $ 0 $ 0