Revenues - Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 549,688	$ 533,098	$ 548,352	$ 500,140	$ 552,052	$ 554,037	$ 560,898	$ 498,715	$ 2,131,278	$ 2,165,702	$ 2,087,185
Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues									1,081,232	1,095,900	1,054,847
Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues									1,050,046	1,069,802	1,032,338
Cable And Connectivity
Disaggregation of Revenue [Line Items]
Revenues									1,662,149	1,709,486	1,652,979
Cable And Connectivity | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues									1,031,687	1,046,744	1,024,090
Cable And Connectivity | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues									630,462	662,742	628,889
Networking, Software & Security
Disaggregation of Revenue [Line Items]
Revenues									469,129	456,216	434,206
Networking, Software & Security | Enterprise Solutions
Disaggregation of Revenue [Line Items]
Revenues									49,545	49,156	30,757
Networking, Software & Security | Industrial Solutions
Disaggregation of Revenue [Line Items]
Revenues									$ 419,584	$ 407,060	$ 403,449