Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2018	Sep. 29, 2018
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 37,953	$ 39,856
Net notional amount of foreign exchange derivatives	22,804	29,315
Gain (loss) projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months	$ 105
Maximum remaining maturity of any forward or optional contract derivatives (in years)	1 year 3 months 15 days
Cash flow derivatives
Derivative [Line Items]
Foreign currency exchange contract asset, net value	$ 235	816
Foreign currency exchange contract, net asset market value	405	989
Foreign currency exchange contract, net liability market value	170	173
Interest rate swaps
Derivative [Line Items]
Gain (loss) projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months	2,777
Notional amount	$ 225,000
Fixed interest rate	1.256%
Interest rate swaps	$ 4,889	7,411
Foreign exchange balance sheet derivative contracts
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	130,780	90,816
Net notional amount of foreign exchange derivatives	40,991	28,271
Foreign currency exchange contract asset, net value	$ (588)	$ 91