Supplemental Statement of Cash Flows Information (Schedule of Supplemental Statement of Cash Flows Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized	$ 11,244	$ 12,280
Income taxes paid	5,420	4,002
Income tax refunds received	6,428
Non-cash activities:
Purchases of property, plant and equipment on account	$ 1,521	$ 1,699