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Investment Securities - Total investment securities for amortized cost and estimated fair value (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Investment Securities    
Amortized Cost $ 90,409 $ 99,847
Gross Unrealized Gains 1,434 1,502
Gross Unrealized (Losses) (54) (21)
Estimated Fair Value 91,789 101,328
Carrying Value $ 90,605 $ 100,059