Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended			18 Months Ended	21 Months Ended	24 Months Ended	27 Months Ended
	Jul. 02, 2017	Apr. 02, 2017	Jul. 03, 2016	Dec. 31, 2017	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 02, 2017	Jul. 02, 2017	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 9,560		$ 5,869		$ 16,160	$ 14,277
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	8,200		1,800		14,100	3,900
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	1,400		3,600		2,100	9,700
Research and Development
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs			500			700
Industrial Restructuring Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	2,400				5,800			$ 13,000
Expected savings from the restructuring program					18,000
Industrial Manufacturing Footprint Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	8,200		2,000		13,900	2,500	$ 31,700
Additional severance and other restructuring costs	$ 11,000				$ 11,000		$ 11,000	$ 11,000	$ 11,000
Grass Valley Restructuring Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		$ 0	$ 900			$ 5,000			$ 34,100
Scenario, Forecast | Industrial Manufacturing Footprint Program
Restructuring Cost and Reserve [Line Items]
Expected savings from the restructuring program				$ 13,000
Scenario, Forecast | Grass Valley Restructuring Program
Restructuring Cost and Reserve [Line Items]
Savings from the restructuring program										$ 30,000
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and integration cost payable period					60 days