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STOCK-BASED COMPENSATION (Details 3) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Y
Stock options outstanding and stock options exercisable  
Stock options outstanding (in shares) 14,000
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 4.1
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 12.12
Options Exercisable (in shares) 11,043
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 8.29
Range of Exercise Prices $0.27 - $2.09
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 0.27
Stock options, range of exercise prices, high end of range (in dollars per share) $ 2.09
Stock options outstanding (in shares) 1,011
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 0.5
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 0.34
Options Exercisable (in shares) 1,011
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0.34
Range of Exercise Prices $3.29 - $3.29
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 3.39
Stock options, range of exercise prices, high end of range (in dollars per share) $ 3.29
Stock options outstanding (in shares) 4,400
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 2.2
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 3.29
Options Exercisable (in shares) 4,400
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 3.29
Range of Exercise Prices $5.72 - $6.21
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 5.72
Stock options, range of exercise prices, high end of range (in dollars per share) $ 6.21
Stock options outstanding (in shares) 27
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 2.8
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 6.13
Options Exercisable (in shares) 27
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 6.13
Range of Exercise Prices $8.44 - $8.44
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 8.44
Stock options, range of exercise prices, high end of range (in dollars per share) $ 8.44
Stock options outstanding (in shares) 2,458
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 2.9
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 8.44
Options Exercisable (in shares) 2,458
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 8.44
Range of Exercise Prices $11.36 - $15.60
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 11.36
Stock options, range of exercise prices, high end of range (in dollars per share) $ 15.60
Stock options outstanding (in shares) 203
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 5.8
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 13.47
Options Exercisable (in shares) 129
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 13.40
Range of Exercise Prices $15.86 - $15.86
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 15.86
Stock options, range of exercise prices, high end of range (in dollars per share) $ 15.86
Stock options outstanding (in shares) 2,090
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 5.4
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 15.86
Options Exercisable (in shares) 1,543
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 15.86
Range of Exercise Prices $15.94 - $17.44
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 15.94
Stock options, range of exercise prices, high end of range (in dollars per share) $ 17.44
Stock options outstanding (in shares) 146
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 5.8
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 16.78
Options Exercisable (in shares) 46
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 16.55
Range of Exercise Prices $17.82- $17.82
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 17.82
Stock options, range of exercise prices, high end of range (in dollars per share) $ 17.82
Stock options outstanding (in shares) 1,517
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 6.9
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 17.82
Options Exercisable (in shares) 835
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 17.82
Range of Exercise Prices $18.07 - $28.98
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 18.07
Stock options, range of exercise prices, high end of range (in dollars per share) $ 28.98
Stock options outstanding (in shares) 1,416
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 7.0
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 22.17
Options Exercisable (in shares) 543
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 21.94
Range of Exercise Prices $32.56 - $74.78
 
Stock options outstanding and stock options exercisable  
Stock options, range of exercise prices, low end of range (in dollars per share) $ 32.56
Stock options, range of exercise prices, high end of range (in dollars per share) $ 74.78
Stock options outstanding (in shares) 732
Options Outstanding, Weighted Average Remaining Contractual Term (in years) 9.2
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 50.90
Options Exercisable (in shares) 51
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 39.49