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Supplemental Statements of Cash Flows Information (Schedule of Supplemental Statement of Cash Flows Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Supplemental Statement of Cash Flows Information
Interest paid, net of amounts capitalized			$ 22,173	$ 14,032
Income taxes paid			44,661	28,592
Income tax refunds received			1,294	1,841
Non-cash activities:
Purchases of property, plant and equipment on account			8,081	9,051
Impact of the adoption of ASC 606 (Note 3)			28,886
Common shares issued from treasury to settle benefit obligations (Note 20)	$ 14,846	$ 14,741	14,846	$ 14,741
Purchases of treasury stock on account			$ 4,204

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Non Cash Activities Impact Of Adoption ASC 606

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