Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Apr. 01, 2012	Apr. 03, 2011
Components of property and equipment
Property and Equipment, gross	$ 254,615	$ 248,260
Less accumulated depreciation and amortization	176,605	171,126
Property and Equipment, net	78,010	77,134
Land [Member]
Components of property and equipment
Property and Equipment, gross	11,663	11,663
Buildings and improvements [Member]
Components of property and equipment
Property and Equipment, gross	41,186	40,984
Production and test equipment [Member]
Components of property and equipment
Property and Equipment, gross	193,820	187,655
Furniture and Fixtures [Member]
Components of property and equipment
Property and Equipment, gross	$ 7,946	$ 7,958

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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