Supplemental Statement of Cash Flows Information (Schedule of Supplemental Statement of Cash Flows Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized	$ 12,280	$ 10,749
Income taxes paid	4,002	7,086
Income tax refunds received		12
Non-cash activities:
Purchases of property, plant and equipment on account	$ 1,699	2,551
Impact of the adoption of ASC 842		$ 255