Revenues - Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 605,565	$ 551,381
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	349,124	314,278
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	256,441	237,103
Americas
Disaggregation of Revenue [Line Items]
Revenues	375,091	357,321
Americas | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	225,279	215,128
Americas | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	149,812	142,193
EMEA
Disaggregation of Revenue [Line Items]
Revenues	145,921	112,865
EMEA | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	73,329	48,580
EMEA | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	72,592	64,285
APAC
Disaggregation of Revenue [Line Items]
Revenues	84,553	81,195
APAC | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	50,516	50,570
APAC | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 34,037	$ 30,625