Property, Plant, and Equipment, Net (Property, Plant, and Equipment - Net) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013
Property, Plant, and Equipment, Net
Land and Land Improvements	$ 57,441		$ 57,562
Buildings and improvements	198,315		195,008
Leasehold improvements	20,614		18,924
Machinery and production equipment	316,552		305,692
Computer equipment and software	99,507		97,538
Office furniture and equipment	24,510		24,400
Other	17,781		14,197
Construction in progress	97,754		81,428
Property, Plant and Equipment, Gross, Total	832,474		794,749
Less accumulated depreciation	(456,885)		(444,701)
Property, Plant and Equipment, Net, Total	375,589		350,048
Depreciation expense	10,632	10,273
Capitalized interest	$ 975	$ 100