Segment information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 633,925	$ 630,642
Operating profit	103,434	157,086
Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	134,075	186,719
Unallocated expenses
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	(30,641)	(29,633)
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	375,493	358,002
Americas | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	83,602	140,969
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	141,253	156,124
EMEA | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	22,995	20,419
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	63,690	53,129
Asia | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	14,916	10,232
OEM
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	53,489	63,387
OEM | Operating Segments
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating profit	$ 12,562	$ 15,099