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Goodwill And Intangible Assets Goodwill And Intangible Assets (Goodwill Narrative) (Details) - USD ($) $ in Thousands | Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017 | Oct. 01, 2016
--- | --- | --- | --- | ---
Goodwill |  |  |  |
Goodwill | $ 784,240 | $ 797,217 | $ 774,268 | $ 740,162
Space and Defense Controls |  |  |  |
Goodwill |  |  |  |
Goodwill | 261,684 | 261,732 | 259,951 | 261,482
Goodwill, accumulated impairment loss | 4,800 |  |  |
Industrial Systems |  |  |  |
Goodwill |  |  |  |
Goodwill | 345,617 | $ 355,578 | $ 332,942 | $ 298,986
Goodwill, accumulated impairment loss | $ 38,200 |  |  |

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