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Securities - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]          
Mortgage-backed securities with a book value $ 227,972   $ 227,972   $ 231,672
Fair Value $ 199,930   $ 199,930   201,299
Percentage of equity securities 10.00%   10.00%    
Repurchase agreements $ 16,040   $ 16,040   10,787
Gross gains from sales of available for sale securities     0 $ 0  
Gross losses from sales of available for sale securities     0 183  
Investments in debt and marketable equity securities $ 193,012   $ 193,012   194,818
Temporarily impaired debt securities percentage of investment securities portfolio 97.00%   97.00%    
Tax benefit to net realized gains (losses) $ 0 $ (52) $ 0 $ (52)  
Asset Pledged as Collateral with Right [Member]          
Debt Securities, Available-for-sale [Line Items]          
Carrying value of securities pledged as collateral 81,295   81,295   138,022
Tax benefit to net realized gains (losses) 0 $ (52)      
Maturity Overnight [Member]          
Debt Securities, Available-for-sale [Line Items]          
Repurchase agreements 16,000   16,000    
Mortgage-backed securities – GSE residential [Member]          
Debt Securities, Available-for-sale [Line Items]          
Mortgage-backed securities with a book value 198,149   198,149   203,139
Fair Value 172,893   172,893   175,726
Investments in debt and marketable equity securities 169,092   169,092   172,930
Small Business Administration [Member]          
Debt Securities, Available-for-sale [Line Items]          
Mortgage-backed securities with a book value 16,919   16,919   17,629
Fair Value 14,654   14,654   15,233
Investments in debt and marketable equity securities 14,654   14,654   13,910
Debt Securities [Member]          
Debt Securities, Available-for-sale [Line Items]          
Investments in debt and marketable equity securities $ 193,012   $ 193,012   $ 194,818