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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares
12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Statement of Stockholders' Equity [Abstract]      
Cash dividends declared on common stock (in dollars per share) $ 0.20 $ 0.20 $ 0.20