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Segment information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 27, 2021 | Jun. 28, 2020 | Jun. 27, 2021 | Jun. 28, 2020
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net revenues | $ 713,473 | $ 567,034 | $ 1,347,398 | $ 1,197,676
Operating profit | 128,620 | 38,810 | 232,054 | 195,896
Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 167,130 | 88,332 | 301,205 | 275,050
Unallocated expenses |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | (38,510) | (49,522) | (69,151) | (79,154)
Americas |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net revenues | 414,785 | 312,490 | 790,278 | 670,492
Americas | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 105,379 | 47,539 | 188,981 | 188,507
EMEA |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net revenues | 157,129 | 131,643 | 298,382 | 287,767
EMEA | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 23,301 | 14,923 | 46,296 | 35,342
Asia |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net revenues | 80,603 | 67,069 | 144,293 | 120,198
Asia | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 23,188 | 13,626 | 38,104 | 23,858
OEM |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Net revenues | 60,956 | 55,832 | 114,445 | 119,219
OEM | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | $ 15,262 | $ 12,244 | $ 27,824 | $ 27,343

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