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Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets Amortization Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Intangible Assets Net Excluding Goodwill [Abstract]        
Amortization expense $ 9,728 $ 11,305 $ 29,481 $ 45,470