Share-Based Compensation - Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 8,088	$ 11,475	$ 9,326
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	898	1,118	1,084
Selling, General and Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	5,330	8,244	6,688
Research and Development Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 1,860	$ 2,113	$ 1,554