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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2022
Sep. 30, 2021
Current Assets:    
Allowance for accounts receivable $ 3,032 $ 2,068
Common Stock    
Common stock, par value (in dollars per share) $ 0.10 $ 0.10
Common stock, shares authorized (in shares) 160,000,000 160,000,000
Common stock, shares issued (in shares) 112,222,865 112,222,865
Common stock, shares outstanding (in shares) 105,290,017 107,898,859
Preferred Stock    
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Treasury Stock    
Treasury stock, shares (in shares) 6,932,848 4,324,006