INCOME TAXES Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Liability [Line Items]
Tax credit and net operating loss carryforwards	$ 318,471	$ 290,523
Allowances for bad debts	372	231
Revenue	54,475	63,916
Costs and expenses	34,116	29,004
Inventories	7,576	7,004
Deferred Tax Assets, Goodwill and Intangible Assets	9,799	13,667
Gross deferred tax assets	424,809	404,345
Valuation allowance	(406,123)	(398,733)
Deferred tax assets after valuation allowance	18,686	5,612
Costs and expenses	(5,654)	(3,540)
Acquired intangible assets	(8,554)	0
Other	(5,910)	0
Gross deferred tax liabilities	(20,118)	(3,540)
Net deferred tax (liabilities) assets	(1,432)	2,072
Long-term deferred tax assets, net (in other assets)	2,011	2,208
Long-term deferred tax liabilities, net	3,443	$ (136)
Deferred tax assets related to exercise of employee stock options excluded from deferred tax schedule	33,700
US Federal and State [Member]
Deferred Tax Liability [Line Items]
Tax credit carry forwards	53,100
Net operating loss carryforwards	745,600
Foreign [Member]
Deferred Tax Liability [Line Items]
Tax credit carry forwards	3,700
Net operating loss carryforwards	33,800
Valuation allowance, tax credits	3,700
Valuation allowance, net operating losses	$ 23,100