Supplemental Statements of Cash Flows Information (Schedule of Cash Flow Supplemental Disclosures) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Supplemental Statements of Cash Flows Information
Interest paid, net of amounts capitalized	$ 31,764	$ 30,090
Income taxes paid	59,431	48,801
Income tax refunds received	1,715	426
Purchases of property, plant and equipment on account	13,656	39,122
Property, plant and equipment acquired by capital lease	1,626	0
Common shares issued from treasury to settle benefit plan obligations (Note 18)	13,999	12,574
Cashless exercise of stock options	$ 753	$ 0