Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Apr. 01, 2017	Apr. 02, 2016	Oct. 20, 2016	Oct. 01, 2016
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 25,323		$ 25,323			$ 29,092
Net notional amount of foreign exchange derivatives	22,509		22,509			24,884
Recognized in earnings as a result of the ineffectiveness of cash flow hedges (less than)	6	$ 1	7	$ 1
Amount projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months			$ (117)	$ (213)
Maximum remaining maturity of any forward or optional contract derivatives (in years)			1 year 9 months 19 days	1 year 2 months
Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign currency exchange contract, net value	131		$ 131			484
Foreign currency exchange contract, net liability market value	504		504			633
Foreign currency exchange contract, net asset market value	373		373			149
Interest Rate Swap [Member]
Derivative [Line Items]
Amount projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months			(454)
Notional amount					$ 275,000
Fixed interest rate					1.256%
Interest rate swaps	4,310		4,310
Foreign Exchange Balance Sheet Derivative Contracts [Member]
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	52,773		52,773			13,187
Net notional amount of foreign exchange derivatives	17,420		17,420			1,347
Foreign currency exchange contract, net value	$ 196		$ 196			$ 78