Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Restructuring Cost and Reserve [Line Items]
Total Costs	$ 12,795	$ 14,143	$ 27,072	$ 33,533
Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	174	13,722	5,871	28,543
Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	5,573	192	7,280	832
Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	4,746	118	7,982	3,054
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	2,302	54	5,910	2
Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	0	57	29	1,102
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance	1,152	12,077	4,885	13,089
Employee Severance [Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	(114)	11,978	(865)	12,691
Employee Severance [Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	(21)	99	55	171
Employee Severance [Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	184	0	1,961	967
Employee Severance [Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance	1,103	0	3,734	(740)
Employee Severance [Member] | Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	0	0	0	0
Other Than Severance Costs Restructuring and Integration Costs Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	11,643	2,066	22,187	20,444
Other Than Severance Costs Restructuring and Integration Costs Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	288	1,744	6,736	15,852
Other Than Severance Costs Restructuring and Integration Costs Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	5,594	93	7,225	661
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	4,562	118	6,021	2,087
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	1,199	54	2,176	742
Other Than Severance Costs Restructuring and Integration Costs Member] | Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs	$ 0	$ 57	$ 29	$ 1,102