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Implementation of the New Revenue Recognition Standard (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 01, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition
Retained earnings	$ 821,668	$ 825,396		$ 825,396		$ 801,834
Net sales		$ 382,679	$ 296,212	$ 1,025,277	$ 823,189
ASU 2014-09 \| Adjustments
Revenue, Initial Application Period Cumulative Effect Transition
Retained earnings	24,500
Net sales	114,900
Cost of Goods Sold	$ 90,400