Property, Plant, and Equipment, Net (Property, Plant, and Equipment - Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Property, Plant, and Equipment, Net
Land and Land Improvements	$ 57,562	$ 27,794
Buildings and improvements	195,008	189,458
Leasehold improvements	18,924	20,821
Machinery and production equipment	305,692	284,494
Computer equipment and software	97,538	89,565
Office furniture and equipment	24,400	23,272
Other	14,197	2,444
Construction in progress	81,428	27,643
Property, Plant and Equipment, Gross, Total	794,749	665,491
Less accumulated depreciation	(444,701)	(430,986)
Property, Plant and Equipment, Net, Total	350,048	234,505
Depreciation expense	37,254	35,808	40,400
Capitalized interest	$ 1,215	$ 658	$ 1,354