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Segments of Business (Schedule Of Operations By Geographic Area) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2016
Jul. 01, 2016
Apr. 01, 2016
Jan. 01, 2016
Oct. 02, 2015
Jul. 03, 2015
Apr. 03, 2015
Jan. 02, 2015
Sep. 30, 2016
Oct. 02, 2015
Oct. 03, 2014
Segment Reporting Information [Line Items]                      
Net sales $ 74,937 $ 139,300 $ 134,192 $ 85,298 $ 85,673 $ 140,883 $ 133,111 $ 70,822 $ 433,727 $ 430,489 $ 425,410
Total assets 310,279       299,204       310,279 299,204  
Long-term assets [1] 89,248       84,616       89,248 84,616  
United States: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 357,592 350,340 337,603
Total assets 219,625       210,060       219,625 210,060  
Long-term assets [1] 81,292       79,045       81,292 79,045  
Europe: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 32,069 35,547 40,659
Total assets 52,642       59,740       52,642 59,740  
Long-term assets [1] 3,713       5,162       3,713 5,162  
Canada: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 28,308 28,155 27,715
Other Geographic Areas: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 15,758 16,447 19,433
Canada And Other: [Member]                      
Segment Reporting Information [Line Items]                      
Total assets 38,012       29,404       38,012 29,404  
Long-term assets [1] $ 4,243       $ 409       4,243 409  
GeographyEliminations [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 (24,574) (27,336) (28,732)
GeographyEliminations [Member] | United States: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 14,672 17,872 16,186
GeographyEliminations [Member] | Europe: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 9,824 9,371 12,349
GeographyEliminations [Member] | Canada: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 16 11 11
GeographyEliminations [Member] | Other Geographic Areas: [Member]                      
Segment Reporting Information [Line Items]                      
Net sales                 $ 62 $ 82 $ 186
[1] Long term assets consist of net property, plant and equipment, net intangible assets, goodwill and other assets excluding deferred income taxes.