Other Comprehensive Income (Loss) (Schedule Of Changes In Each Component Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	$ 428,777	$ 405,260	$ 258,142
Other comprehensive net gain (loss) reclassifications	1,620	9,026	(5,418)
Net (gain) loss reclassified to earnings	(231)	794	622
Other comprehensive income (loss)	1,389	9,820	(4,796)
Reclassification to retained earnings	0
Balance at the end of the year	477,932	428,777	405,260
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	3,946	673	1,005
Other comprehensive net gain (loss) reclassifications	(2,174)	3,273	(332)
Net (gain) loss reclassified to earnings	0	0	0
Other comprehensive income (loss)	(2,174)	3,273	(332)
Reclassification to retained earnings	0
Balance at the end of the year	1,772	3,946	673
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	1,953	(255)	386
Other comprehensive net gain (loss) reclassifications	4,325	2,110	(855)
Net (gain) loss reclassified to earnings	(598)	98	214
Other comprehensive income (loss)	3,727	2,208	(641)
Reclassification to retained earnings	640
Balance at the end of the year	6,320	1,953	(255)
Accumulated Defined Benefit Plans Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	(6,452)	(10,791)	(6,968)
Other comprehensive net gain (loss) reclassifications	(531)	3,643	(4,231)
Net (gain) loss reclassified to earnings	367	696	408
Other comprehensive income (loss)	(164)	4,339	(3,823)
Reclassification to retained earnings	0
Balance at the end of the year	(6,616)	(6,452)	(10,791)
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at the beginning of the year	(553)	(10,373)	(5,577)
Reclassification to retained earnings	640
Balance at the end of the year	$ 1,476	$ (553)	$ (10,373)