Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 29,136	$ 29,092
Net notional amount of foreign exchange derivatives	24,093	24,884
Recognized in earnings as a result of the ineffectiveness of cash flow hedges	8	1	$ 1
Cash flow hedge gain (loss) to be reclassified within twelve months	$ (444)
Maximum remaining maturity of foreign currency derivatives	1 year 3 months
Cash Flow Hedging [Member]
Derivative [Line Items]
Foreign currency exchange contract, net value	$ 478	484
Net market value of the foreign currency exchange contracts, assets	73	149
Net market value of the foreign currency exchange contracts, liabilities	551	633
Interest Rate Swap [Member]
Derivative [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months	853
Notional amount	$ 275,000
Fixed interest rate	1.256%
Interest rate swaps	$ 3,499
Foreign Exchange Balance Sheet Derivative Contracts [Member]
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	52,208	13,187
Net notional amount of foreign exchange derivatives	14,762	1,347
Foreign currency exchange contract, net value	$ (77)	$ 78