Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2016	Mar. 29, 2015
Restructuring Cost and Reserve [Line Items]
Total Costs	$ 8,408	$ 14,483
Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	4,378	11,527
Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	500	568
Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	865	1,773
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	2,665	(52)
Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs		667
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance	1,542	2,054
Employee Severance [Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	(784)	2,303
Employee Severance [Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance		50
Employee Severance [Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	444	441
Employee Severance [Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance	1,882	(740)
Other Than Severance Costs Restructuring and Integration Costs Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	6,866	12,429
Other Than Severance Costs Restructuring and Integration Costs Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	5,162	9,224
Other Than Severance Costs Restructuring and Integration Costs Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	500	518
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	421	1,332
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	$ 783	688
Other Than Severance Costs Restructuring and Integration Costs Member] | Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs		$ 667