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CONVERTIBLE SENIOR NOTES (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 27, 2010
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Debt          
Non-cash deferred financing amortization costs included in interest expense   $ 564   $ 1,051  
Predecessor          
Debt          
Non-cash interest expense recognized         $ 1,592
Non-cash deferred financing amortization costs included in interest expense     $ 2,071   $ 4,291
Predecessor | 2010 Notes          
Debt          
Proceeds from convertible debt $ 125,000        
Interest rate on convertible notes (as a percent) 5.00%        
Effective interest rate on liability component (as a percent)     10.00%   10.00%
Cash interest expense recognized     $ 345   $ 1,886
Non-cash interest expense recognized     293   1,592
Non-cash deferred financing amortization costs included in interest expense     $ 39   $ 216