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Debt Securities - Narrative (Details)
 12 Months Ended
Jun. 30, 2022
USD ($)
security
Jun. 30, 2021
USD ($)
security
Jun. 30, 2020
USD ($)
Debt Securities, Available-for-sale [Line Items]      
Gain on sale of debt securities available for sale $ 1,895,000 $ 0 $ 0
Gross realized losses 0 0 $ 0
Debt securities available for sale, at fair value (amortized cost of $130,099 and $154,493 at June 30, 2,022 and June 30, 2,021, respectively) 126,978,000 156,459,000  
Market value of available-for-sale securities pledged as collateral $ 41,876,000 $ 53,897,000  
Number of securities with unrealized losses | security 177 28  
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Debt securities available for sale, at fair value (amortized cost of $130,099 and $154,493 at June 30, 2,022 and June 30, 2,021, respectively) Debt securities available for sale, at fair value (amortized cost of $130,099 and $154,493 at June 30, 2,022 and June 30, 2,021, respectively)  
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss $ 533,000 $ 754,000  
Collateral Pledged      
Debt Securities, Available-for-sale [Line Items]      
Debt securities available for sale, at fair value (amortized cost of $130,099 and $154,493 at June 30, 2,022 and June 30, 2,021, respectively) $ 43,187,000 $ 52,603,000