Revenues - Major Product Category (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
Cable & Connectivity
Disaggregation of Revenue [Line Items]
Revenues	397,197	380,492
Cable & Connectivity | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	234,467	234,181
Cable & Connectivity | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	162,730	146,311
Networking, Software & Security
Disaggregation of Revenue [Line Items]
Revenues	208,368	170,889
Networking, Software & Security | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	114,657	80,097
Networking, Software & Security | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 93,711	$ 90,792