Net Other Operating Income and Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Subsidiary, Sale of Stock [Line Items]
Income resulting from the amortization of the deferred income related to the Patterson exclusivity payment									$ 10,000	$ 10,000	$ 10,000
Gain/(Loss) from patent infringement settlement									4,414	0	0
Net other operating income	$ 2,500	$ 2,500	$ 2,500	$ 6,914	$ 2,500	$ 2,500	$ 2,500	$ 2,500	$ 14,414	$ 10,000	$ 10,000