PROPERTY AND EQUIPMENT (Details) (USD $)	3 Months Ended
Sep. 30, 2012	Dec. 31, 2011
Property and Equipment [Line Items]
Fully depreciated fixed assets, write off	$ 8,700,000
Property, plant and equipment, gross	186,932,000	189,743,000
Accumulated depreciation and amortization	143,107,000	136,256,000
Property, plant and equipment, net	43,825,000	53,487,000
Computer and Video Equipment and Software [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	132,352,000	132,022,000
Manufacturing Tooling and Testbeds [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	5,500,000	6,407,000
Office Equipment [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	4,812,000	4,709,000
Furniture, Fixtures and Other [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	11,437,000	11,819,000
Leasehold Improvements [Member]
Property and Equipment [Line Items]
Property, plant and equipment, gross	$ 32,831,000	$ 34,786,000

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.

+ References+ Details

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.

+ References+ Details

- 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.

+ References+ Details