Property and Equipment - Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Mar. 30, 2014
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 288,557	$ 291,654
Less accumulated depreciation and amortization	210,056	205,127
Property and Equipment, net	78,501	86,527
Land [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	11,663	14,656
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	38,996	47,629
Production and Test Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	229,268	221,031
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 8,630	$ 8,338