Segment Information (External Net Sales by Geographical Area) (Details) (USD $) In Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
External net sales, United States									$ 874,791	$ 797,826	$ 730,545
Consolidated external net sales	489,294	438,467	418,866	365,075	412,003	356,367	349,352	339,308	1,711,702	1,457,030	1,430,125
Europe [Member]
External net sales, foreign countries									473,054	377,094	406,910
Asia [Member]
External net sales, foreign countries									264,493	191,761	188,958
All Other Countries [Member]
External net sales, foreign countries									$ 99,364	$ 90,349	$ 103,712