Stock-Based Employee Compensation (Expense by Category) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Jan. 03, 2016	Dec. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 9,462	$ 5,898	$ 25,878	$ 16,562
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	666	592	1,993	1,347
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	4,433	2,562	11,608	7,547
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	4,363	2,724	12,309	7,875
Discontinued operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 0	$ 20	$ (32)	$ (207)