Supplemental Statement of Cash Flows Information (Schedule of Supplemental Statement of Cash Flows Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized			$ 18,068	$ 17,689
Income taxes paid			59,677	44,589
Income tax refunds received			3,662	1,392
Non-cash activities:
Purchases of property, plant and equipment on account			2,127	3,743
Common shares issued from treasury to settle benefit obligations	$ 21,887	$ 19,307	$ 21,887	$ 19,467