Other Comprehensive Income (Loss) (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ (25,882)	$ (30,821)	$ (8,489)
Income tax provision (benefit)	(17,105)	(2,073)	6,018
Cost of sale	472,503	485,677	418,743
Selling and marketing	126,333	124,912	94,992
General and administrative	79,240	87,539	69,313
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total net gains (losses) included in net income	598	(98)	(214)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax provision (benefit)	159	300	176
Total net gains (losses) included in net income	(367)	(696)	(408)
Cost of sale	(288)	(543)	(319)
Selling and marketing	(148)	(282)	(165)
General and administrative	(90)	(171)	(100)
Income before income taxes	(526)	(996)	(584)
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total net gains (losses) included in net income	231	(794)	(622)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax provision (benefit)	(207)	57	120
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Foreign Exchange Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	(399)	459	(334)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Interest Rate Swap [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ 1,204	$ (614)	$ 0