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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized			$ 17,689	$ 12,458
Income taxes paid			44,589	20,914
Income tax refunds received			1,392	6,517
Non-cash activities:
Purchases of property, plant and equipment on account			3,743	1,072
Common shares issued from treasury to settle benefit obligations	$ 19,307	$ 17,168	$ 19,467	17,168
Purchases of treasury stock on account				$ 11,080