Severance, Restructuring and Acquisition Integration Activities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended					6 Months Ended
	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2015	Jun. 28, 2015	Jul. 02, 2017	Jul. 03, 2016	Jun. 28, 2015	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		$ 5,869			$ 4,907		$ 14,277	$ 19,390
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		1,800			1,800		3,900	3,200
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		3,600			2,700		9,700	14,500
Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		500			400		700	1,700
Grass Valley Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		900					5,000
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	$ 1,000
Productivity Improvement Program and Acquisition Integration [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs					$ 4,900			$ 19,400
Productivity Improvement Program and Acquisition Integration [Member] | M2FX Limited [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		600					1,000
Industrial Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		2,400					5,800
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	$ 2,000
Industrial Manufacturing Footprint Program [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs		$ 2,000					$ 2,500
Industrial Manufacturing Footprint Program [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Additional severance and other restructuring costs									$ 15,000	$ 16,000
Expected savings from the restructuring program						$ 10,000
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and integration cost payable period							60 days