Other (Income) Expense, Net (Schedule of Other (Income) Expense, Net) (Parenthetical) (Details) - USD ($) $ in Thousands			12 Months Ended
	Aug. 11, 2020	Dec. 30, 2019	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Net (gain) loss on sales of assets			$ 4,452	$ 23,598	$ (1,925)
Duarte Facility [Member]
Net (gain) loss on sales of assets	$ 8,801	$ 13,522		22,323
Loveland Campus [Member]
Net (gain) loss on sales of assets				$ 2,330