SEGMENTS OF BUSINESS (Schedule Of Operations By Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 29, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 30, 2022	Sep. 30, 2022	Jul. 01, 2022	Apr. 01, 2022	Dec. 31, 2021	Sep. 29, 2023	Sep. 30, 2022	Oct. 01, 2021
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:	$ 96,345	$ 187,047	$ 202,115	$ 178,337	$ 196,389	$ 203,819	$ 189,623	$ 153,524	$ 663,844	$ 743,355	$ 751,651
Total assets:	681,606				679,931				681,606	679,931
Long-term assets:	204,599				188,204				204,599	188,204
United States:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Total assets:	565,402				581,004				565,402	581,004
Long-term assets:	188,073				177,191				188,073	177,191
Europe:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Total assets:	44,360				40,040				44,360	40,040
Long-term assets:	6,578				6,363				6,578	6,363
Canada and other
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Total assets:	71,844				58,887				71,844	58,887
Long-term assets:	$ 9,948				$ 4,650				9,948	4,650
Operating Segment | United States:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									569,383	649,867	659,330
Operating Segment | Europe:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									39,155	34,427	30,509
Operating Segment | Canada:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									39,465	44,635	48,867
Operating Segment | Other:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									15,841	14,425	12,945
Interunit transfers
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									(43,757)	(46,337)	(40,685)
Interunit transfers | United States:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									33,873	34,212	30,593
Interunit transfers | Europe:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									9,866	12,109	9,974
Interunit transfers | Canada:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									0	0	12
Interunit transfers | Other:
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Net sales:									$ 18	$ 17	$ 106