Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014	Sep. 27, 2014
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	$ 56,600	$ 49,400	$ 56,600	$ 49,400
Net notional amount of foreign exchange derivatives	48,200	38,900	48,200	38,900
Net market value of the foreign currency exchange contracts	300	(100)	300	(100)
Derivative asset, fair value	1,110	200	1,110	200	$ 2,391
Derivative Liability, Securities Sold under Agreements to Resell, Securities Loaned, Gross	800	300	800	300
Recognized in earnings as a result of the ineffectiveness of cash flow hedges	100	100	100	100
Amount projected to be reclassified from Accumulated Other Comprehensive Income into earnings			600	200
Foreign Exchange Balance Sheet Derivative Contracts [Member]
Derivative [Line Items]
Gross notional amount of foreign exchange derivatives outstanding	77,000	97,800	77,000	97,800
Net notional amount of foreign exchange derivatives	21,300	24,600	$ 21,300	$ 24,600
Maximum [Member]
Derivative [Line Items]
Maximum remaining maturity of any forward or optional contract derivatives (in years)			2 years	1 year 2 months 12 days
Maximum [Member] | Foreign Exchange Balance Sheet Derivative Contracts [Member]
Derivative [Line Items]
Net market value of the foreign currency exchange contracts	$ (100)	$ 300	$ (100)	$ 300