INCOME TAXES Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Asset (Liability) [Line Items]
Deferred Tax Assets, Capital Loss Carryforwards	$ 1,700
Tax credit and net operating loss carryforwards	267,706	$ 369,847
Allowances for bad debts	34	431
Revenues	18,057	35,856
Costs and expenses	16,149	26,537
Inventories	4,501	9,118
Acquired intangible assets	1,830	6,112
Gross deferred tax assets	308,277	447,901
Valuation allowance	(298,955)	(432,631)
Deferred tax assets after valuation allowance	9,322	15,270
Costs and expenses	(3,608)	(6,457)
Acquired intangible assets	(2,189)	(3,669)
Basis differerence convertible notes	(2,207)	(4,812)
Gross deferred tax liabilities	(8,004)	(14,938)
Net deferred tax assets (liabilities)	1,318	332
Long-term deferred tax assets, net (in other assets)	1,318	1,245
Long-term deferred tax liabilities, net	0	(913)
Net deferred tax assets (liabilities)	1,318	332
Deferred tax assets related to exercise of employee stock options excluded from deferred tax schedule		$ 33,700
US Federal and State [Member]
Deferred Tax Asset (Liability) [Line Items]
Tax credit carryforwards	52,300
Net operating loss carryforwards	786,800
Foreign [Member]
Deferred Tax Asset (Liability) [Line Items]
Tax credit carryforwards	5,300
Net operating loss carryforwards	113,900
Valuation allowance, tax credits	5,300
Valuation allowance, net operating losses	$ 111,600