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Segment Information (Segment Sales by Customer) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jan. 02, 2021 | Dec. 28, 2019
Segment Reporting Information |  |
Net sales | $ 683,954 | $ 754,843
Commercial Customer |  |
Segment Reporting Information |  |
Net sales | 314,163 | 420,931
U.S. Government Customer |  |
Segment Reporting Information |  |
Net sales | 301,170 | 273,317
Other Customer |  |
Segment Reporting Information |  |
Net sales | 68,621 | 60,595
Aircraft Controls |  |
Segment Reporting Information |  |
Net sales | 286,774 | 339,954
Aircraft Controls | Commercial Customer |  |
Segment Reporting Information |  |
Net sales | 81,076 | 166,260
Aircraft Controls | U.S. Government Customer |  |
Segment Reporting Information |  |
Net sales | 156,677 | 132,209
Aircraft Controls | Other Customer |  |
Segment Reporting Information |  |
Net sales | 49,021 | 41,485
Space And Defense Controls |  |
Segment Reporting Information |  |
Net sales | 188,162 | 186,240
Space And Defense Controls | Commercial Customer |  |
Segment Reporting Information |  |
Net sales | 31,134 | 34,152
Space And Defense Controls | U.S. Government Customer |  |
Segment Reporting Information |  |
Net sales | 138,172 | 134,687
Space And Defense Controls | Other Customer |  |
Segment Reporting Information |  |
Net sales | 18,856 | 17,401
Industrial Systems |  |
Segment Reporting Information |  |
Net sales | 209,018 | 228,649
Industrial Systems | Commercial Customer |  |
Segment Reporting Information |  |
Net sales | 201,953 | 220,519
Industrial Systems | U.S. Government Customer |  |
Segment Reporting Information |  |
Net sales | 6,321 | 6,421
Industrial Systems | Other Customer |  |
Segment Reporting Information |  |
Net sales | $ 744 | $ 1,709

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