Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Oct. 01, 2016
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 31,825		$ 31,825		$ 29,092
Net notional amount of foreign exchange derivatives	28,441		28,441		24,884
Recognized in earnings as a result of the ineffectiveness of cash flow hedges (less than $1)	0	$ 1	7	$ 1
Gain (loss) projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months			$ (279)	$ (246)
Maximum remaining maturity of any forward or optional contract derivatives (in years)			1 year 6 months	1 year
Cash flow derivatives
Derivative [Line Items]
Foreign currency exchange contract, net value	238		$ 238		484
Foreign currency exchange contract, net liability market value	339		339		633
Foreign currency exchange contract, net asset market value	101		101		149
Interest rate swaps
Derivative [Line Items]
Gain (loss) projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months			96
Notional amount	$ 275,000		$ 275,000
Fixed interest rate	1.256%		1.256%
Interest rate swaps	$ 3,491		$ 3,491
Foreign exchange balance sheet derivative contracts
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	25,186		25,186		13,187
Net notional amount of foreign exchange derivatives	7,282		7,282		1,347
Foreign currency exchange contract, net value	$ 43		$ 43		$ 78