Derivative Financial Instruments (Notional Amounts Of Outstanding Forward Contracts) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Notional amounts of outstanding forward contracts	$ 155,530	$ 212,932
Canadian/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	82,188	92,748
Euro/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	43,181	65,773
Chinese Renminbi/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	4,192	19,973
Japanese Yen/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	13,148	13,676
Swiss Franc/U.S. Dollar [Member]
Notional amounts of outstanding forward contracts	0	9,419
British Pound/Euro [Member]
Notional amounts of outstanding forward contracts	5,622	3,993
All Other [Member]
Notional amounts of outstanding forward contracts	$ 7,199	$ 7,350