Other (Income) Expense, Net (Schedule of Other (Income) Expense, Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Nonoperating Income (Expense) [Abstract]
Equity interest in the earnings of the JV	$ (11,386)	$ (8,701)	$ (21,542)	$ (18,856)
Rent income	(86)	(88)	(172)	(170)
Net gain on sales of assets and businesses	(10,806)	(863)	(20,049)	(872)
Net loss (gain) on investments in deferred compensation program	1,034	(1,785)	1,133	(4,394)
Gain on non-recurring matter related to a previous acquisition				(4,803)
Other components of net periodic pension and other postretirement benefit, excluding service cost and interest expense	(3,323)	(2,947)	(6,639)	(5,866)
Other	(237)	0	(622)	(62)
Other (income) expense, net	$ (24,804)	$ (14,384)	$ (47,891)	$ (35,023)