PROPERTY AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Property and Equipment [Line Items]
Property, plant and equipment, gross	$ 193,550	$ 189,743
Accumulated depreciation and amortization	141,337	136,256
Property, plant and equipment, net	52,213	53,487
Computer and Video Equipment and Software [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	135,414	132,022
Manufacturing Tooling and Testbeds [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	6,458	6,407
Office Equipment [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	4,717	4,709
Furniture, Fixtures and Other [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	11,829	11,819
Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	$ 35,132	$ 34,786

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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