PROPERTY AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 189,743	$ 186,456
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	136,256	123,937
Property, plant and equipment, net	53,487	62,519
Computer and Video Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	132,022	125,690
Property, Plant and Equipment, Useful Life, Minimum (in years)	2
Property, Plant and Equipment, Useful Life, Maximum (in years)	5
Manufacturing Tooling and Testbeds [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,407	6,234
Property, Plant and Equipment, Useful Life, Minimum (in years)	3
Property, Plant and Equipment, Useful Life, Maximum (in years)	5
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,709	4,785
Property, Plant and Equipment, Useful Life, Minimum (in years)	3
Property, Plant and Equipment, Useful Life, Maximum (in years)	5
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,819	12,745
Property, Plant and Equipment, Useful Life, Minimum (in years)	3
Property, Plant and Equipment, Useful Life, Maximum (in years)	8
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 34,786	$ 37,002