Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Derivative [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months	$ 609
Maximum remaining maturity of foreign currency derivatives	1 year 1 month 6 days
Cash flow derivatives
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 43,033	$ 39,856
Net notional amount of foreign exchange derivatives	38,177	29,315
Derivative assets (liabilities), at fair value, net	774	816
Net market value of the foreign currency exchange contracts, assets	907	989
Net market value of the foreign currency exchange contracts, liabilities	133	173
Interest rate swaps
Derivative [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months	$ 886
Fixed interest rate	1.256%
Foreign exchange balance sheet derivative contracts
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 60,827	90,816
Net notional amount of foreign exchange derivatives	118	28,271
Derivative assets (liabilities), at fair value, net	$ (118)	$ 91