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Reportable Segments, Geographic Information and Major Customers - Reportable Segments Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
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Sep. 30, 2017 USD ($) | Jul. 01, 2017 USD ($) | Apr. 01, 2017 USD ($) | Dec. 31, 2016 USD ($) | Oct. 01, 2016 USD ($) | Jul. 02, 2016 USD ($) | Apr. 02, 2016 USD ($) | Jan. 02, 2016 USD ($) | Sep. 30, 2017 USD ($) segment | Oct. 01, 2016 USD ($) | Oct. 03, 2015 USD ($)
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 3 |  |
Net sales | $ 669,852 | $ 618,832 | $ 604,349 | $ 635,019 | $ 653,064 | $ 667,616 | $ 618,660 | $ 616,664 | $ 2,528,052 | $ 2,556,004 | $ 2,654,290
Operating income (loss) |  |  |  |  |  |  |  |  | 129,908 | 99,439 | 115,436
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (13,578) | (14,635) | (13,964)
Interest income |  |  |  |  |  |  |  |  | 5,042 | 4,242 | 3,499
Miscellaneous |  |  |  |  |  |  |  |  | 451 | (1,652) | 1,324
Income before income taxes |  |  |  |  |  |  |  |  | 121,823 | 87,394 | 106,295
Depreciation |  |  |  |  |  |  |  |  | 45,330 | 47,414 | 48,378
Capital expenditures |  |  |  |  |  |  |  |  | 38,538 | 31,123 | 35,076
Total assets | 1,976,182 |  |  |  | 1,765,819 |  |  |  | 1,976,182 | 1,765,819 |
Corporate |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  | (105,922) | (117,237) | (105,237)
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 4,581 | 4,497 | 4,110
Capital expenditures |  |  |  |  |  |  |  |  | 863 | 2,549 | 915
Elimination of inter-segment sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (110,384) | (105,057) | (160,924)
Corporate and eliminations |  |  |  |  |  |  |  |  |  |  |
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Total assets | 44,390 |  |  |  | 28,416 |  |  |  | 44,390 | 28,416 |
AMER | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,166,346 | 1,328,760 | 1,389,017
Operating income (loss) |  |  |  |  |  |  |  |  | 41,924 | 64,921 | 68,585
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 19,694 | 19,937 | 17,753
Capital expenditures |  |  |  |  |  |  |  |  | 18,111 | 14,389 | 17,595
Total assets | 595,851 |  |  |  | 590,850 |  |  |  | 595,851 | 590,850 |
APAC | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,279,261 | 1,161,851 | 1,285,905
Operating income (loss) |  |  |  |  |  |  |  |  | 200,103 | 155,501 | 160,217
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 15,588 | 16,874 | 18,176
Capital expenditures |  |  |  |  |  |  |  |  | 13,816 | 10,786 | 9,590
Total assets | 1,163,111 |  |  |  | 1,009,917 |  |  |  | 1,163,111 | 1,009,917 |
EMEA | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 192,829 | 170,450 | 140,292
Operating income (loss) |  |  |  |  |  |  |  |  | (6,197) | (3,746) | (8,129)
Other income (expense): |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 5,467 | 6,106 | 8,339
Capital expenditures |  |  |  |  |  |  |  |  | 5,748 | 3,399 | $ 6,976
Total assets | $ 172,830 |  |  |  | $ 136,636 |  |  |  | $ 172,830 | $ 136,636 |

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