Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($)	9 Months Ended
	Jun. 29, 2019	Sep. 29, 2018
Derivative [Line Items]
Gain (loss) projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months	$ 98,000
Maximum remaining maturity of any forward or optional contract derivatives (in years)	1 year 4 months 24 days
Cash flow derivatives
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 35,412,000	$ 39,856,000
Net notional amount of foreign exchange derivatives	28,176,000	29,315,000
Foreign currency exchange contract asset (liability), net value	85,000	816,000
Foreign currency exchange contract, net asset market value	350,000	989,000
Foreign currency exchange contract, net liability market value	265,000	173,000
Interest rate swap
Derivative [Line Items]
Gain (loss) projected to be reclassified from Accumulated Other Comprehensive Income into earnings, within twelve months	1,391,000
Notional amount	$ 225,000,000
Fixed interest rate	1.256%
Interest rate swaps	$ 1,664,000	7,411,000
Foreign exchange balance sheet derivative contracts
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	94,824,000	90,816,000
Net notional amount of foreign exchange derivatives	27,833,000	28,271,000
Foreign currency exchange contract asset (liability), net value	$ (225,000)	$ 91,000