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Investment Securities - Investments with Unrealized Loss Positions for total investment securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Jun. 30, 2019
Investment Securities    
Unrealized Holding Losses Less Than 12 Months, Fair Value $ 12,254 $ 6,796
Unrealized Holding Losses Less Than 12 Months, Unrealized Losses 110 9
Unrealized Holding Losses 12 Months or More, Fair Value 2,072 4,540
Unrealized Holding Losses 12 Months or More, Unrealized Losses 11 12
Unrealized Holding Losses Total, Fair Value 14,326 11,336
Unrealized Holding Losses Total, Unrealized Losses $ 121 $ 21