Summary Of Significant Accounting Policies (Notional Amounts Of Outstanding Forward Contracts) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Notional amounts of outstanding forward contracts	$ 133,903	$ 212,932
Canadian/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	54,133	92,748
Euro/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	53,716	65,773
British Pound/Euro [Member]
Notional amounts of outstanding forward contracts	388	3,993
Chinese Renminbi/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	3,666	19,973
Japanese Yen/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	13,415	13,676
Swiss Franc/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	0	9,419
All Other [Member]
Notional amounts of outstanding forward contracts	$ 8,585	$ 7,350