PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Capitalized Computer Software, Additions	$ 5,100	$ 3,400	$ 0
Property, plant and equipment, gross	168,102	158,301
Accumulated depreciation and amortization	132,621	126,165
Property, plant and equipment, net	35,481	32,136
Capitalized Computer Software, Amortization	1,800	500
Computer and video equipment and software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	116,751	113,220
Manufacturing tooling and testbeds [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,044	2,327
Office equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,942	4,664
Furniture, fixtures and other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,621	8,659
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 33,744	$ 29,431