Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Restructuring Cost and Reserve [Line Items]
Total Costs	$ 14,143	$ 9,158	$ 33,533	$ 48,809
Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	13,722	5,794	28,543	34,761
Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	192	226	832	2,047
Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	118	2,106	3,054	10,250
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	54	1,032	2	1,751
Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	57		1,102
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance	12,077	1,812	13,089	30,203
Employee Severance [Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	11,978	54	12,691	18,156
Employee Severance [Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	99	(347)	171	1,245
Employee Severance [Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance		1,282	967	9,393
Employee Severance [Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance		823	(740)	1,409
Other Than Severance Costs Restructuring and Integration Costs Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	2,066	7,346	20,444	18,606
Other Than Severance Costs Restructuring and Integration Costs Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	1,744	5,740	15,852	16,605
Other Than Severance Costs Restructuring and Integration Costs Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	93	573	661	802
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	118	824	2,087	857
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	54	$ 209	742	$ 342
Other Than Severance Costs Restructuring and Integration Costs Member] | Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	$ 57		$ 1,102