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LONG TERM DEBT (Details 2) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
May 21, 2013
Long-term debt    
Fair value of the liability component $ 204,738  
Accumulated accretion of discount 1,482  
Net carrying amount 206,220  
Convertible Senior Notes Due 2020
   
Long-term debt    
Fair value of the liability component 154,738 154,700
Accumulated accretion of discount 1,482  
Net carrying amount 156,220  
Senior Secured Notes Due 2018
   
Long-term debt    
Net carrying amount $ 50,000