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Reportable Segments, Geographic Information and Major Customers - Reportable Segments Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 29, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 30, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jul. 01, 2017 USD ($) | Apr. 01, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 29, 2018 USD ($) segment | Sep. 30, 2017 USD ($) | Oct. 01, 2016 USD ($)
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 3 |  |
Net sales | $ 771,178 | $ 726,385 | $ 698,651 | $ 677,294 | $ 669,852 | $ 618,832 | $ 604,349 | $ 635,019 | $ 2,873,508 | $ 2,528,052 | $ 2,556,004
Operating income (loss): |  |  |  |  |  |  |  |  | 118,283 | 129,908 | 99,439
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (12,226) | (13,578) | (14,635)
Interest income |  |  |  |  |  |  |  |  | 4,696 | 5,042 | 4,242
Miscellaneous |  |  |  |  |  |  |  |  | (3,143) | 451 | (1,652)
Income before income taxes |  |  |  |  |  |  |  |  | 107,610 | 121,823 | 87,394
Depreciation |  |  |  |  |  |  |  |  | 48,095 | 45,330 | 47,414
Capital expenditures |  |  |  |  |  |  |  |  | 62,780 | 38,538 | 31,123
Total assets | 1,932,642 |  |  |  | 1,976,182 |  |  |  | 1,932,642 | 1,976,182 |
Elimination of inter-segment sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (124,935) | (110,384) | (105,057)
Corporate |  |  |  |  |  |  |  |  |  |  |
Operating income (loss): |  |  |  |  |  |  |  |  | (135,736) | (105,922) | (117,237)
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 4,863 | 4,581 | 4,497
Capital expenditures |  |  |  |  |  |  |  |  | 4,149 | 863 | 2,549
Corporate and eliminations |  |  |  |  |  |  |  |  |  |  |
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Total assets | 155,544 |  |  |  | 44,390 |  |  |  | 155,544 | 44,390 |
AMER | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,218,944 | 1,166,346 | 1,328,760
Operating income (loss): |  |  |  |  |  |  |  |  | 38,637 | 41,924 | 64,921
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 21,224 | 19,694 | 19,937
Capital expenditures |  |  |  |  |  |  |  |  | 17,690 | 18,111 | 14,389
Total assets | 645,791 |  |  |  | 595,851 |  |  |  | 645,791 | 595,851 |
APAC | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,498,010 | 1,279,261 | 1,161,851
Operating income (loss): |  |  |  |  |  |  |  |  | 213,935 | 200,103 | 155,501
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 15,954 | 15,588 | 16,874
Capital expenditures |  |  |  |  |  |  |  |  | 33,018 | 13,816 | 10,786
Total assets | 937,510 |  |  |  | 1,163,111 |  |  |  | 937,510 | 1,163,111 |
EMEA | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 281,489 | 192,829 | 170,450
Operating income (loss): |  |  |  |  |  |  |  |  | 1,447 | (6,197) | (3,746)
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 6,054 | 5,467 | 6,106
Capital expenditures |  |  |  |  |  |  |  |  | 7,923 | 5,748 | $ 3,399
Total assets | $ 193,797 |  |  |  | $ 172,830 |  |  |  | $ 193,797 | $ 172,830 |

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