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Investment Securities - Additional Information (Details) - USD ($)
3 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Schedule of Held-to-Maturity Securities [Line Items]      
Sale of security held to maturity $ 0 $ 0  
Securities available-for-sale 0   $ 0
Sale of securities available-for-sale 0 0  
Available-for-sale, Realized gain   17,000  
Purchase of available-for-sale securities 0 0  
Regal Bancorp Inc      
Schedule of Held-to-Maturity Securities [Line Items]      
Sale of securities available-for-sale   19,200,000  
Available-for-sale securities acquired   $ 20,900,000  
Secure Public Funds      
Schedule of Held-to-Maturity Securities [Line Items]      
Mortgage-backed security 1,700,000   $ 1,800,000
Mortgage-backed Securities of U.S. Government and Government-sponsored Agencies      
Schedule of Held-to-Maturity Securities [Line Items]      
Expected credit loss $ 0