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FAIR VALUE MEASUREMENTS (Details) - Recurring basis
$ in Thousands
Jun. 30, 2016
USD ($)
Carrying Amount  
Assets:  
Warrants $ 2,438
Liabilities:  
Debt 410,057
Amount of equity component of convertible notes 77,000
Fair Value  
Assets:  
Warrants 2,438
Total assets 2,438
Liabilities:  
Debt 390,813
Total liabilities 390,813
Level 1  
Liabilities:  
Debt 390,813
Total liabilities 390,813
Level 2  
Assets:  
Warrants 2,438
Total assets $ 2,438