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Segment and Geographic Data, Revenue and assets by geographic area (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Dec. 31, 2015 | Oct. 03, 2015 | Jul. 04, 2015 | Apr. 04, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 570,819 | $ 591,955 | $ 590,051 | $ 570,606 | $ 555,928 | $ 560,654 | $ 590,470 | $ 593,436 | $ 2,323,431 | $ 2,300,488 | $ 2,493,282
Property and equipment, net | 848,871 |  |  |  | 865,296 |  |  |  | 848,871 | 865,296 |
United States [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 542,506 | 560,973 | 590,145
Property and equipment, net | 94,589 |  |  |  | 94,512 |  |  |  | 94,589 | 94,512 |
Germany [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 746,657 | 719,246 | 821,005
Property and equipment, net | 120,223 |  |  |  | 122,817 |  |  |  | 120,223 | 122,817 |
Czech Republic [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 29,912 |  |  |  | 33,352 |  |  |  | 29,912 | 33,352 |
Other Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 83,744 | 88,553 | 107,598
Property and equipment, net | 83,041 |  |  |  | 85,566 |  |  |  | 83,041 | 85,566 |
Israel [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 10,007 | 12,597 | 13,871
Property and equipment, net | 104,824 |  |  |  | 107,715 |  |  |  | 104,824 | 107,715 |
Asia [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 940,517 | 919,119 | $ 960,663
People's Republic of China [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 183,158 |  |  |  | 182,411 |  |  |  | 183,158 | 182,411 |
Republic of China (Taiwan) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 124,724 |  |  |  | 126,780 |  |  |  | 124,724 | 126,780 |
Other Asia [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | 105,400 |  |  |  | 109,815 |  |  |  | 105,400 | 109,815 |
Other Geographic Area [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Property and equipment, net | $ 3,000 |  |  |  | $ 2,328 |  |  |  | $ 3,000 | $ 2,328 |

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