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Reportable Segments - Reportable Segments Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 | Apr. 01, 2017 | Mar. 31, 2018 | Apr. 01, 2017 | Sep. 30, 2017
Net sales | $ 698,651 | $ 604,349 | $ 1,375,945 | $ 1,239,368 |
Operating income (loss) | 17,315 | 32,571 | 48,872 | 66,474 |
Interest expense | (3,547) | (3,262) | (7,272) | (6,536) |
Interest income | 1,426 | 1,185 | 2,981 | 2,256 |
Miscellaneous | (477) | 1,925 | (823) | 1,251 |
Income before income taxes | 14,717 | 32,419 | 43,758 | 63,445 |
Total assets | 1,909,974 |  | 1,909,974 |  | $ 1,976,182
Elimination of inter-segment sales |  |  |  |  |
Net sales | (27,501) | (22,448) | (59,205) | (51,498) |
Corporate |  |  |  |  |
Operating income (loss) | (42,947) | (24,921) | (71,324) | (51,820) |
Corporate and eliminations |  |  |  |  |
Total assets | 135,401 |  | 135,401 |  | 44,390
AMER | Operating Segments |  |  |  |  |
Net sales | 301,835 | 272,064 | 600,878 | 586,715 |
Operating income (loss) | 10,702 | 8,229 | 21,225 | 23,026 |
Total assets | 599,331 |  | 599,331 |  | 595,851
APAC | Operating Segments |  |  |  |  |
Net sales | 350,375 | 309,758 | 696,498 | 619,727 |
Operating income (loss) | 49,171 | 50,484 | 99,703 | 98,724 |
Total assets | 984,816 |  | 984,816 |  | 1,163,111
EMEA | Operating Segments |  |  |  |  |
Net sales | 73,942 | 44,975 | 137,774 | 84,424 |
Operating income (loss) | 389 | $ (1,221) | (732) | $ (3,456) |
Total assets | $ 190,426 |  | $ 190,426 |  | $ 172,830

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