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Investment Securities - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]      
Unrealized Holding Losses Total, Unrealized Losses $ 20,776   $ 18,858
Unrealized Holding Losses 12 Months or More, Unrealized Losses 20,721   18,542
Unrealized holding losses, 12 months or more 20,721   18,542
U.S. government sponsored enterprise CMO      
Debt Securities, Available-for-sale [Line Items]      
Unrealized Holding Losses 12 Months or More, Unrealized Losses 347   336
Unrealized holding losses, 12 months or more 347   336
U.S. government sponsored enterprise MBS      
Debt Securities, Available-for-sale [Line Items]      
Principal payments from investment securities 6,700 $ 9,300  
Proceeds from sale of investment securities available for sale 0 $ 0  
Unrealized Holding Losses 12 Months or More, Unrealized Losses 20,373   18,206
Unrealized holding losses, 12 months or more $ 20,373   $ 18,206