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Income Taxes (U.S. And Foreign Income Before Income Taxes) (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
Income Taxes [Abstract]                      
United States                 $ 28,881 $ 11,886 $ 11,592
Foreign                 (5,226) 3,867 5,830
Profit before income taxes $ (4,360) $ 13,865 $ 14,669 $ (519) $ (244) $ 16,101 $ 6,820 $ (6,924) $ 23,655 $ 15,753 $ 17,422