Balance Sheet Items (Schedule Of Restructuring Costs) (Details) - 3 months ended Jun. 27, 2015 $ in Thousands	USD ($) employee
Restructuring Cost and Reserve [Line Items]
Number of employees, reduction in force | employee	200
Restructuring costs	$ 13,085
Charges related to site closures, asset impairments, and completion costs	2,000
Cost Of Revenues [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,164
Research And Development, Net [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	7,944
Selling, General And Administrative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	3,977
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	15,000
Restructuring costs	13,000
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	16,000
Restructuring costs	$ 14,000