Restructuring (Narrative) (Details) - Employee severance $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 01, 2017 USD ($)	Jul. 03, 2016 USD ($)	Jan. 01, 2017 USD ($) employee	Jan. 03, 2016 USD ($)	Apr. 03, 2016 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 17,898
Payments for restructuring actions			9,549
Accrued balance for employee severance costs	$ 11,165		11,165		$ 2,816
Automotive and Industrial Division (AID) Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 6,400	$ 3,100
Number of reduced headcount (employees) | employee			49
ZMDI
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 6,900
Number of reduced headcount (employees) | employee					36
Payments for restructuring actions				$ 1,100
Radio Frequency (RF) Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 7,500
Number of reduced headcount (employees) | employee			13
Payments for restructuring actions	2,900		$ 3,200
Accrued balance for employee severance costs	4,300		4,300
Other Restructuring Plan1
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 1,200	$ 2,800
Number of reduced headcount (employees) | employee			57
Payments for restructuring actions	900		$ 1,000
Accrued balance for employee severance costs	1,800		1,800
Other Restructuring Plan2
Restructuring Cost and Reserve [Line Items]
Payments for restructuring actions	1,000
Accrued balance for employee severance costs	$ 200		$ 200
Former executives | ZMDI
Restructuring Cost and Reserve [Line Items]
Number of reduced headcount (employees) | employee					2