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INCOME TAXES (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
United States and foreign income (loss) before income taxes and non-controlling interest      
Income (loss) before income taxes $ (20,379,000) $ 33,187,000 $ 14,695,000
Gross U.S. deferred income tax liability on undistributed foreign earnings 0    
Current      
Federal 1,000   17,000
State   (40,000) 217,000
Foreign 2,730,000 4,643,000 2,339,000
Total Current 2,731,000 4,603,000 2,573,000
Deferred      
Federal 0    
State 0    
Foreign (380,000) (2,211,000) 345,000
Total Deferred (380,000) (2,211,000) 345,000
Total 2,351,000 2,392,000 2,918,000
Unrecognized tax benefits      
Unrecognized tax benefits related to deferred tax assets and federal tax benefit of state income tax items 35,400,000    
Decrease in provision for income taxes due to reduction of gross unrecognized tax benefits 900,000    
Interest and penalties recognized in the statement of income 500,000    
Accrued interest and penalties 3,600,000 3,800,000  
Unrecognized tax benefits      
Beginning balance-gross unrecognized tax benefits (UTB's) 54,012,000 55,650,000 56,513,000
Additions based on tax positions related to the current year 151,000 80,000 121,000
Additions for tax positions related to prior years     176,000
Reductions for tax positions related to prior years (1,627,000) (1,288,000) (1,160,000)
Lapse of statute of limitations (7,106,000) (430,000)  
Ending balance-gross unrecognized tax benefits (UTB's) 45,430,000 54,012,000 55,650,000
UTB's as a credit in deferred taxes (33,187,000) (39,402,000) (39,758,000)
Federal benefit of state taxes (2,244,000) (2,312,000) (2,338,000)
UTB's that would impact the effective tax rate 10,019,000 12,298,000 13,554,000
Deferred Tax Assets      
Allowances and reserves 11,125,000 16,743,000  
Deferred revenue and customer advances, net   3,349,000  
Net operating loss carryforward 254,153,000 218,158,000  
Tax credit carryforwards 95,692,000 103,910,000  
Capital loss carryforwards 18,671,000 18,785,000  
Writedown/amortization of intangible assets and goodwill 15,651,000 19,642,000  
Fixed assets 7,263,000 7,500,000  
Demo equipment income 7,104,000 7,308,000  
Accrued warranties   66,000  
Other 18,459,000 26,404,000  
Total Deferred Tax Assets 428,118,000 421,865,000  
Deferred Tax Liabilities      
Prepaid expense (472,000) (155,000)  
Deferred revenue and customer advances, net (1,183,000)    
Accrued warranties (165,000)    
Total Deferred Tax Liabilities (1,820,000) (155,000)  
Total Deferred Tax Assets (Liabilities) 426,298,000 421,710,000  
Less: Valuation Allowance (422,789,000) (418,285,000)  
Total Deferred Tax Assets (Liabilities) 3,509,000 3,425,000  
Undistributed earnings of foreign subsidiaries permanently reinvested outside the United States 124,800,000    
United States
      
United States and foreign income (loss) before income taxes and non-controlling interest      
Income (loss) before income taxes (156,696,000) 11,826,000 18,671,000
Foreign
      
United States and foreign income (loss) before income taxes and non-controlling interest      
Income (loss) before income taxes $ 136,317,000 $ (45,013,000) $ (3,976,000)