Severance, Restructuring and Acquisition Integration Activities - Severance, Restructuring and Integration Costs by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Restructuring Cost and Reserve [Line Items]
Total Costs	$ 14,483	$ 2,295
Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	11,538	1,753
Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	557	139
Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	1,773	283
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	(52)	120
Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Total Costs	667
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance	2,054	1,283
Employee Severance [Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Severance	2,303	1,283
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	441
Employee Severance [Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance	(740)
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	12,429	1,012
Other Restructuring [Member] | Broadcast Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	9,235	470
Other Restructuring [Member] | Enterprise Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	507	139
Other Restructuring [Member] | Industrial Connectivity Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	1,332	283
Other Restructuring [Member] | Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	688	120
Other Restructuring [Member] | Network Security Solutions [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	$ 667