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SHARE-BASED COMPENSATION - Additional Information (Details) - USD ($)
shares in Millions, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 28, 2015
Jan. 31, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense recognized     $ 0.5 $ 0.8 $ 3.4 $ 6.9
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense expected to be recognized     2.6   $ 2.6  
Compensation expense expected to be recognized, weighted average remaining vesting period         1 year 2 months 12 days  
Performance Based Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance units issued 0.4 2.1        
Award requisite service period         3 years  
Fair value of outstanding performance units issued     0.1   $ 0.1  
Compensation expense expected to be recognized     $ 0.1   $ 0.1  
Compensation expense expected to be recognized, weighted average remaining vesting period         1 year 3 months