Supplemental Statements of Cash Flows Information (Schedule of Cash Flow Supplemental Disclosures) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Supplemental Statements of Cash Flows Information
Interest paid, net of amounts capitalized	$ 12,350	$ 12,784
Income taxes paid	8,175	3,587
Income tax refunds received	34	5,864
Purchases of property, plant and equipment on account	1,393	926
Cashless exercise of stock options	0	1,124
Reduction of accounts receivable and short-term borrowing due to the settlement of accounts receivable previously sold with recourse	0	1,706
Reduction to goodwill due to favorable resolution of lease termination recorded in restructuring reserve	0	103
Payment of director fees through issuance of treasury stock	$ 0	$ 15