Other Comprehensive Income (Loss) (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 787,955	$ 650,147	$ 563,934
Income tax provision (benefit)	(2,073)	6,018	13,710
Cost of sale	485,677	418,743	344,321
Selling and marketing	124,912	94,992	82,974
General and administrative	87,539	69,313	51,438
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	(98)	(214)	2,738
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax provision (benefit)	300	176	151
Total net gains (losses) included in net income	(696)	(408)	(350)
Cost of sale	(543)	(319)	(273)
Selling and marketing	(282)	(165)	(143)
General and administrative	(171)	(100)	(85)
Income before income taxes	(996)	(584)	(501)
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	(794)	(622)	2,388
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)	57	120	(1,561)
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	459	(334)	4,299
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	$ (614)	$ 0	$ 0