Revenues - Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 587,175	$ 605,565
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	326,527	349,124
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	260,648	256,441
Americas
Disaggregation of Revenue [Line Items]
Revenues	363,838	375,091
Americas | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	211,264	225,279
Americas | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	152,574	149,812
EMEA
Disaggregation of Revenue [Line Items]
Revenues	140,635	145,921
EMEA | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	67,320	73,329
EMEA | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	73,315	72,592
APAC
Disaggregation of Revenue [Line Items]
Revenues	82,702	84,553
APAC | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	47,943	50,516
APAC | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 34,759	$ 34,037