Derivative Financial Instruments (Notional Amounts Of Outstanding Forward Contracts) (Details) - Forward Contracts - USD ($) $ in Thousands	Dec. 30, 2017	Sep. 30, 2017
Designated as Hedging Instrument
Notional amounts	$ 114,946	$ 101,597
Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amounts	77,676	64,831
Designated as Hedging Instrument | Japanese Yen / U.S. Dollar
Notional amounts	21,255	22,675
Designated as Hedging Instrument | Swedish Krona / U.S. Dollar
Notional amounts	16,015	14,091
Not Designated as Hedging Instrument
Notional amounts	294,645	318,519
Not Designated as Hedging Instrument | Canadian / U.S. Dollar
Notional amounts	7,687	12,809
Not Designated as Hedging Instrument | Swiss Franc / Euro
Notional amounts	0	7,157
Not Designated as Hedging Instrument | Chinese Yuan offshore / Euro
Notional amounts	0	10,423
Not Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amounts	239,592	244,000
Not Designated as Hedging Instrument | Japanese Yen / Euro
Notional amounts	17,898	17,694
Not Designated as Hedging Instrument | Israeli Shekel / U.S. Dollar
Notional amounts	7,346	8,820
Not Designated as Hedging Instrument | Japanese Yen / U.S. Dollar
Notional amounts	3,438	3,198
Not Designated as Hedging Instrument | Swedish Krona / U.S. Dollar
Notional amounts	6,650	4,627
Not Designated as Hedging Instrument | Singapore Dollar / U.S. Dollar
Notional amounts	1,696	1,186
Not Designated as Hedging Instrument | All other
Notional amounts	$ 10,338	$ 8,605