Severance, Restructuring and Acquisition Integration Activities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		28 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 11,688	$ 16,679	$ 57,010	$ 32,839
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and integration cost payable period			60 days
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	4,800	12,400	$ 21,400	26,500
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	6,400	4,200	30,300	6,200
Research and Development
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	500	100	5,300	100
Grass Valley And SAM Integration Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	7,100		36,600
Additional severance and restructuring costs	12,000		12,000		$ 12,000
Industrial Manufacturing Footprint Program
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 4,300	$ 11,400	$ 15,800	$ 25,300	$ 64,100