Share-Based Compensation - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 4,542	$ 6,105	$ 8,088
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	586	722	898
Selling, General and Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	2,847	4,213	5,330
Research and Development Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 1,109	$ 1,170	$ 1,860