Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Cash interest paid	$ 112,766	$ 116,988	$ 125,803
Cash income taxes paid	43,035	48,824	43,241
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
Accounts Payable
Acquisitions accounted for under the purchase method:
Property, plant and equipment additions included in total liabilities	24,551	$ 9,488	$ 8,242
Other Current Assets
Acquisitions accounted for under the purchase method:
Property, plant and equipment deposits inlcuded in other current assets	$ 3,749