Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014 Program	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs	$ 38,208,000	$ 5,000,000	$ 39,651,000	$ 5,800,000
Number of significant programs			2
Additional severance and other restructuring costs and accelerated depreciation expense	32,000,000		32,000,000
Broadcast Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs		3,500,000		4,300,000
Industrial IT Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs	719,000		719,000
Severance expense		1,300,000		1,300,000
Cost of sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs	8,000,000	3,100,000	8,000,000	3,200,000
Selling, general and administrative expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs	28,900,000	1,000,000	30,000,000	1,600,000
Research and development [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other restructuring costs	$ 1,300,000	$ 900,000	$ 1,700,000	$ 1,000,000