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CAPITAL STOCK, Restricted Stock and Restricted Stock Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted Stock, Par or Stated Value Per Share $ 0.01    
Restricted Stock Units (RSUs) [Member]      
Non-Vested Restricted Stock and Restricted Stock Units Activity [Roll Forward]      
Non-vested at beginning of period (in shares) 3,063,248,000    
Granted (in shares) 2,554,852,000    
Vested (in shares) (688,106,000)    
Forfeited (in shares) (1,985,175,000)    
Non-vested at end of period (in shares) 2,944,819,000 3,063,248,000  
Expected to vest (in shares) 2,205,433,000    
Weighted-average grant date fair value, non-vested at beginning of period (in dollars per share) $ 5.10    
Weighted-average grant date fair value, granted (in dollars per share) 5.01 $ 4.63 $ 6.25
Weighted-average grant date fair value, vested (in dollars per share) 5.61    
Weighted-average grant date fair value, forfeited (in dollars per share) 5.10    
Weighted-average grant date fair value, non-vested at end of period (in dollars per share) 4.91    
Weighted-average grant date fair value, expected to vest (in dollars per share) $ 5.04    
Non-vested restricted stock weighted-average remaining contractual term (in years) 1 year 38 days    
Expected to vest restricted stock weighted-average remaining contractual term (in years) 1 year 38 days    
Non-vested restricted stock aggregate intrinsic value $ 13,958    
Expected to vest restricted stock aggregate intrinsic value 10    
Fair value of restricted stock and stock units vested during the period $ 3,900 $ 5,700 $ 5,500
Non-employee Director [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Minimum [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Maximum [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years