Other (Income) Expense, Net (Schedule of Other (Income) Expense, Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Equity interest in the earnings of the JV	$ (8,701)	$ (8,468)	$ (18,856)	$ (13,041)
Net (gain) loss on sales of assets and businesses	(863)	857	(872)	890
Gain on non-recurring matter related to a previous acquisition			(4,803)
Rent income	(88)	(93)	(170)	(181)
Other components of net periodic pension and other postretirement benefit, excluding service cost and interest expense	(2,947)	(2,675)	(5,866)	(5,160)
Other		18	(62)	(68)
Other (income) expense, net	(14,384)	(12,040)	(35,023)	(20,430)
Gain on Investments in Deferred Compensation Program [Member]
Net gain on investments in deferred compensation program	$ (1,785)	$ (1,679)	$ (4,394)	$ (2,870)