Derivative Instruments and Hedging Activities (Notional and Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Oct. 01, 2011
Euro currency hedge contracts
Derivatives, Fair Value [Line Items]
U.S. Notional Contract Value, Purchase	$ 60,133	$ 42,488
U.S. Notional Fair Value, Purchase	61,377	42,103
U.S. Notional Contract Value, Sell	0	0
U.S. Notional Fair Value, Sell	0	0
U.S. Notional Contract Value, Net	60,133	42,488
U.S. Notional Fair Value, Net	61,377	42,103
Other foreign currency hedge contracts
Derivatives, Fair Value [Line Items]
U.S. Notional Contract Value, Purchase	0	2,351
U.S. Notional Fair Value, Purchase	0	2,355
U.S. Notional Contract Value, Sell	(43,565)	(16,783)
U.S. Notional Fair Value, Sell	(43,647)	(16,221)
U.S. Notional Contract Value, Net	(43,565)	(14,432)
U.S. Notional Fair Value, Net	$ (43,647)	$ (13,866)
Forward contracts | Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Maximum maturities of foreign currency derivative instruments (in months)	2 months