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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE Performance-Based Awards Narrative (Details) (USD $)
In Millions, except Share data, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized share-based compensation expense $ 17.8
Performance-Based Awards [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding 1,194,100
Average grant date fair value $ 5.93
PRSU's expected to vest 874,686
Unrecognized share-based compensation expense $ 2.9
Period for recognition 4 years
Performance-Based Awards [Member] | Minimum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 6 months
Performance-Based Awards [Member] | Maximum [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 4 years