Other (Income) Expense, Net (Schedule of Other (Income) Expense, Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Equity interest in the earnings of the JV	$ (4,140)	$ (3,779)	$ (8,815)	$ (6,165)
Net (gain) on sales of assets and businesses	(3)	(1,354)	(1,541)	(1,942)
Rent income	(69)	(393)	(412)	(743)
Other components of net periodic pension and other postretirement benefit, excluding service cost and interest expense	(2,935)	(3,401)	(5,836)	(7,051)
Other	(191)	(130)	(333)	(296)
Other (income) expense, net	(4,887)	(11,331)	(15,561)	(19,454)
Gain (Loss) on Investments in Deferred Compensation Program [Member]
Net loss (gain) on investments in deferred compensation program	$ 2,451	$ (2,274)	$ 1,376	$ (3,257)