Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Total Costs	$ 11,700	$ 12,800	$ 5,900	$ 8,400	$ 13,600	$ 14,100	$ 4,900	$ 14,600	$ 38,770	$ 47,170	$ 70,827
Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs									10,414	39,078	48,557
Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs									11,962	723	3,318
Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs									9,923	6,228	11,953
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs									6,320	169	6,999
Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs									151	972
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance									7,082	19,101	37,254
Employee Severance [Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance									(116)	16,694	20,025
Employee Severance [Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance									636	(186)	2,183
Employee Severance [Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance									2,828	3,309	9,732
Employee Severance [Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance									3,734	(728)	5,314
Employee Severance [Member] | Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance									0	12
Other Than Severance Costs Restructuring and Integration Costs Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs									31,688	28,069	33,573
Other Than Severance Costs Restructuring and Integration Costs Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs									10,530	22,384	28,532
Other Than Severance Costs Restructuring and Integration Costs Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs									11,326	909	1,135
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs									7,095	2,919	2,221
Other Than Severance Costs Restructuring and Integration Costs Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs									2,586	897	$ 1,685
Other Than Severance Costs Restructuring and Integration Costs Member] | Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring and Integration Costs									$ 151	$ 960