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Segments (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Oct. 01, 2016
Jul. 02, 2016
Apr. 02, 2016
Jan. 02, 2016
Oct. 03, 2015
Jul. 04, 2015
Apr. 04, 2015
Jan. 03, 2015
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Revenue, Major Customer and Product Lines                      
Net sales $ 619,078 $ 613,260 $ 611,142 $ 568,457 $ 623,224 $ 634,539 $ 637,246 $ 630,523 $ 2,411,937 $ 2,525,532 $ 2,648,385
Percentage of aftermarket sale in both military and commercial production segment                 29.00% 30.00% 32.00%
Sales Arising From Government Prime Or Sub Contracts Including Military Sales                 $ 726,562 $ 780,259 $ 763,004
Boeing                      
Revenue, Major Customer and Product Lines                      
Sales to Boeing and Boeing Commercial Airplanes                 $ 346,596 $ 399,082 $ 431,148
Percentage of sales to Boeing                 14.00% 16.00% 16.00%
Boeing Commercial Airplanes                      
Revenue, Major Customer and Product Lines                      
Sales to Boeing and Boeing Commercial Airplanes                 $ 251,288 $ 240,984 $ 243,114