Revenues - Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 424,811	$ 548,352	$ 888,337	$ 1,048,492
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	203,374	245,325	415,587	452,408
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	221,437	303,027	472,750	596,084
Cable & Connectivity
Disaggregation of Revenue [Line Items]
Revenues	331,109	435,503	702,997	827,682
Cable & Connectivity | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	193,542	233,024	398,378	434,286
Cable & Connectivity | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	137,567	202,479	304,619	393,396
Networking, Software & Security
Disaggregation of Revenue [Line Items]
Revenues	93,702	112,849	185,340	220,810
Networking, Software & Security | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues	9,832	12,301	17,209	18,122
Networking, Software & Security | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 83,870	$ 100,548	$ 168,131	$ 202,688