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Income Taxes (Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Income Tax Disclosure [Abstract]      
United States $ (2,887) $ 5,170 $ 9,841
International 5,677 4,321 6,849
Income from continuing operations, before income taxes $ 2,790 $ 9,491 $ 16,690