Restructuring (Details)	3 Months Ended	12 Months Ended
	Dec. 28, 2014 USD ($)	Apr. 03, 2016 USD ($) employee	Mar. 29, 2015 USD ($) employee	Mar. 30, 2014 USD ($) employee
Restructuring Reserve [Roll Forward]
Balance as of beginning of period		$ 10,512,000	$ 638,000	$ 1,662,000
Provision		11,632,000	19,383,000	5,538,000
Cash payments		(19,538,000)	(7,494,000)	(6,562,000)
Foreign exchange impact		210,000	(2,015,000)
Balance as of end of period		2,816,000	10,512,000	638,000
Restructuring accrued balance		10,512,000	638,000	1,662,000
Cost of Revenues
Restructuring Reserve [Roll Forward]
Balance as of beginning of period		0	0	26,000
Provision		435,000	0	0
Cash payments		(128,000)	0	(26,000)
Foreign exchange impact		0	0
Balance as of end of period		307,000	0	0
Restructuring accrued balance		0	0	26,000
Operating Expenses
Restructuring Reserve [Roll Forward]
Balance as of beginning of period		295,000	638,000	1,636,000
Provision		11,197,000	1,078,000	5,538,000
Cash payments		(10,533,000)	(1,421,000)	(6,536,000)
Foreign exchange impact		16,000	0
Balance as of end of period		975,000	295,000	638,000
Restructuring accrued balance		295,000	638,000	$ 1,636,000
Employee Severance
Restructuring Reserve [Roll Forward]
Balance as of beginning of period		0
Balance as of end of period			0
Restructuring accrued balance		0	0
Zentrum Mikroelektronik Dresden AG | Employee Severance
Restructuring Reserve [Roll Forward]
Provision		6,900,000
Balance as of end of period		$ 1,200,000
Number of positions eliminated | employee		36
Restructuring accrued balance		$ 1,200,000
Other Restructuring Plan, 2015 Restructuring | Employee Severance
Restructuring Reserve [Roll Forward]
Provision		4,700,000	$ 1,100,000
Cash payments		$ (300,000)
Number of positions eliminated | employee		48	28
Restructuring cost incurred			$ 800,000
Other Restructuring Plan - 2016 Charge | Employee Severance
Restructuring Reserve [Roll Forward]
Cash payments		$ (4,600,000)
Balance as of end of period		0
Restructuring accrued balance		0
Other Restructuring Plan, 2014 Restructuring | Employee Severance
Restructuring Reserve [Roll Forward]
Number of positions eliminated | employee				117
Restructuring cost incurred			600,000	$ 4,900,000
Restructuring charges				5,500,000
High-Speed Converter Business
Restructuring Reserve [Roll Forward]
Balance as of beginning of period		10,217,000	0	0
Provision	$ 11,900,000	0	18,305,000	0
Cash payments		(8,877,000)	(6,073,000)	0
Foreign exchange impact		194,000	(2,015,000)
Balance as of end of period		1,534,000	10,217,000	0
Restructuring accrued balance		$ 10,217,000	0	$ 0
High-Speed Converter Business | Employee Severance
Restructuring Reserve [Roll Forward]
Provision			$ 18,300,000
Number of positions eliminated | employee			53
Executive | Zentrum Mikroelektronik Dresden AG | Employee Severance
Restructuring Reserve [Roll Forward]
Number of positions eliminated | employee		2