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Investment Securities - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Jun. 30, 2024
Sep. 30, 2024
Debt Securities, Available-for-Sale [Line Items]            
Unrealized Holding Losses 12 Months or More, Unrealized Losses $ 13,881   $ 13,881   $ 15,751  
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses 3   3      
Investment securities - held to maturity, allowance for credit losses 0   0   0 $ 0
Impairment loss on held to maturity securities     0   0  
Impairment loss on available for sale securities     0   $ 0  
U.S. government sponsored enterprise MBS            
Debt Securities, Available-for-Sale [Line Items]            
Principal payments from investment securities 5,300 $ 5,900 11,100 $ 12,600    
Proceeds from sale of investment securities available for sale 0 $ 0 0 $ 0    
U.S. Government sponsored enterprise securities            
Debt Securities, Available-for-Sale [Line Items]            
Allowance for credit losses on investment securities $ 0   $ 0