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Segment Information - Revenues and Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 28, 2019 | Sep. 29, 2018 | Sep. 28, 2019 | Sep. 29, 2018 | Dec. 29, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | $ 361,971 | $ 439,191 | $ 1,165,350 | $ 1,316,187 |
Long-lived assets | 329,792 |  | 329,792 |  | $ 339,894
Additions to long-lived assets |  |  | 47,375 | 55,946 |
United States |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 105,292 | 125,867 | 340,811 | 386,980 |
Long-lived assets | 56,790 |  | 56,790 |  | 58,691
Additions to long-lived assets |  |  | 4,972 | 5,636 |
China |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 101,960 | 117,813 | 316,553 | 352,097 |
Long-lived assets | 88,386 |  | 88,386 |  | 95,806
Additions to long-lived assets |  |  | 12,418 | 19,043 |
Mexico |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Long-lived assets | 73,350 |  | 73,350 |  | 70,495
Additions to long-lived assets |  |  | 12,650 | 14,089 |
Germany |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Long-lived assets | 35,817 |  | 35,817 |  | 36,548
Additions to long-lived assets |  |  | 4,335 | 5,917 |
Philippines |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Long-lived assets | 37,775 |  | 37,775 |  | 32,459
Additions to long-lived assets |  |  | 9,546 | 6,133 |
Other countries |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 154,719 | $ 195,511 | 507,986 | 577,110 |
Long-lived assets | $ 37,674 |  | 37,674 |  | $ 45,895
Additions to long-lived assets |  |  | $ 3,454 | $ 5,128 |

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599 + Details
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