Derivative Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Dec. 31, 2011 Other Current Assets [Member]	Sep. 30, 2011 Other Current Assets [Member]
Fair value of our forward contracts			$ 100,000	$ 5,500,000
Net losses on foreign currency exposures	2,197,000	2,200,000
Net realized and unrealized (gain) loss on forward contracts (excluding the underlying foreign currency exposure being hedged)	$ 700,000	$ (1,300,000)