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Investment Securities - Investments with Unrealized Loss Positions for total investment securities (Details) - USD ($)
Sep. 30, 2025
Jun. 30, 2025
Investment Securities    
Unrealized Holding Losses Less Than 12 Months, Fair Value $ 37,000 $ 361,000
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses 1,000 1,000
Unrealized Holding Losses 12 Months or More, Fair Value 89,667,000 93,487,000
Unrealized Holding Losses 12 Months or More, Unrealized Losses 9,365,000 10,413,000
Unrealized Holding Losses Total, Fair Value 89,704,000 93,848,000
Unrealized Holding Losses Total, Unrealized Losses $ 9,365,000 $ 10,414,000