Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2015	Mar. 29, 2015
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs			$ 8,408		$ 14,483
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs			2,200		1,400
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs			6,000		11,800
Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs			200		1,300
Grass Valley Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs			4,100
Savings from the restructuring program				$ 30,000
Grass Valley Restructuring Program [Member] \| Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Estimated severance charges and other restructuring costs	$ 2,000	$ 2,000
Productivity Improvement Program and Acquisition Integration [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs					$ 14,500
Industrial Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs			3,500
Expected savings from the restructuring program			$ 18,000
Industrial Restructuring Program [Member] \| Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Additional severance and other restructuring costs		$ 5,000
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration cost payable period			60 days