Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015
Restructuring Cost and Reserve [Line Items]
Total Costs	$ 5,869	$ 4,907	$ 14,277	$ 19,390
Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	1,319	3,283	5,697	14,810
Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	1,207	83	1,707	651
Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	2,371	1,163	3,236	2,936
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	943		3,608	(52)
Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	29	378	29	1,045
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance	1,451	(1,042)	3,733	1,012
Employee Severance [Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	(109)	(1,590)	(751)	713
Employee Severance [Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	71	22	76	72
Employee Severance [Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	1,180	526	1,777	967
Employee Severance [Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance	309		2,631	(740)
Other Than Severance Costs Restructuring and Integration Costs Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	4,418	5,949	10,544	18,378
Other Than Severance Costs Restructuring and Integration Costs Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	1,428	4,873	6,448	14,097
Other Than Severance Costs Restructuring and Integration Costs Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	1,136	61	1,631	579
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	1,191	637	1,459	1,969
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	634		977	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	$ 29	$ 378	$ 29	$ 1,045