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STOCKHOLDERS' EQUITY-Common stock and warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
Apr. 06, 2017
Sep. 09, 2016
Jun. 30, 2017
Dec. 31, 2016
May 15, 2016
Stockholders' equity          
Authorized shares of capital stock, after amendment of certificate of incorporation   1,001,000,000      
Authorized shares of common stock, after amendment of certificate of incorporation     1,000,000,000 1,000,000,000  
Common stock, par value (in dollars per share)     $ 0.0001 $ 0.0001  
Additional Paid in Capital   $ 571,114 $ 1,002,469 $ 592,663  
8.0% convertible note due 2017          
Stockholders' equity          
Number of warrants issued   900,000      
Senior Unsecured Notes Held by Certain Holders          
Stockholders' equity          
Number of warrants issued   3,800,000      
Warrants Issued to Former Holders of Unsecured and Convertible Notes          
Stockholders' equity          
Number of warrants issued   4,700,000      
Exercise price (in dollars per share)   $ 14.04      
Additional Paid in Capital   $ 16,700      
Preferred stock          
Stockholders' equity          
Authorized shares of preferred stock, after amendment of certificate of incorporation   1,000,000      
Common Stock          
Stockholders' equity          
Shares issued 55,200,000 90,000,000      
Authorized shares of common stock, after amendment of certificate of incorporation   1,000,000,000      
Common stock, par value (in dollars per share)   $ 0.0001      
Series A Preferred Stock          
Stockholders' equity          
Preferred stock, shares outstanding     0    
Predecessor          
Stockholders' equity          
Additional Paid in Capital   $ 3,287,906      
Predecessor | Series A Preferred Stock          
Stockholders' equity          
Dividend rate (as a percent)   5.75%      
Predecessor | Restructuring of indebtedness and capitalization | The Restructuring Support Agreement | 8.0% convertible note due 2017          
Stockholders' equity          
Exercise price (in dollars per share)   $ 14.04      
Predecessor | Restructuring of indebtedness and capitalization | The Restructuring Support Agreement | Senior Unsecured Notes Held by Certain Holders          
Stockholders' equity          
Exercise price (in dollars per share)   $ 14.04     $ 14.04