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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Income Statement [Abstract]      
Net gain (loss) on available for sale securities reclassified from accumulated other comprehensive income (loss) $ 51 $ 729 $ (8,177)
Income tax expense (benefit) reclassified from accumulated other comprehensive income (loss) $ 13 $ 184 $ (2,330)