Property and Equipment - Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 290,039	$ 289,234
Less accumulated depreciation and amortization	205,127	192,898
Property and Equipment, net	84,912	96,336
Land [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	14,656	14,656
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	47,629	46,462
Production and Test Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	219,416	220,130
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 8,338	$ 7,986