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Summary Of Significant Accounting Policies (Reclassifications Out of Accumulated OCI) (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
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Income tax expense (benefit) $ (2,233) $ 7,024 $ 5,348 $ 15 $ (1,411) $ 6,104 $ 3,174 $ (2,730) $ 10,154 $ 5,137 $ 8,299
Other income and expense                 1,407 (1,299) 1,434
Net income (loss) $ (2,127) $ 6,841 $ 9,321 $ (534) $ 1,167 $ 9,997 $ 3,646 $ (4,194) 13,501 10,616 9,123
Reclassification Out Of Accumulated Other Comprehensive Income [Member]                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Net income (loss)                 102 562 346
Unamortized Loss On Defined Benefit Pension Plans [Member]                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Cost of Sales / Operating Expense                 566 622 341
Income tax expense (benefit)                 (215) (237) (130)
Foreign Currency Translation Adjustment [Member]                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Other income and expense                 $ (249) $ 177 $ 135