Supplemental Disclosure of Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Cash interest paid, net of capitalized interest	$ 116,988	$ 125,803	$ 138,419
Cash income taxes paid (net of refunds of $30,984 for Fiscal 2011)	48,824	43,241	73,638
Acquisitions accounted for under the purchase method:
Fair value of assets acquired		111,141
Liabilities assumed		(28,537)
Less: Cash acquired		(131)
Net cash paid		82,473
Property, plant and equipment additions included in accounts payable	$ 9,488	$ 8,242	$ 11,986