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Earnings (Loss) per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Oct. 04, 2016
8.5% Convertible perpetual preferred stock      
Potentially Dilutive Securities      
Preferred stock, dividend rate, percentage   8.50%  
Successor      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Basic loss $ 50,808    
Weighted Average Shares, Basic 26,801,000    
Basic loss per share (in dollars per share) $ 1.90    
Effect of dilutive securities      
Restricted stock $ 0    
Restricted stock (in shares) 0    
Performance share units $ 0    
Performance share units (in shares) 0    
Diluted loss $ 50,808    
Weighted average shares, diluted 26,801,000    
Diluted loss per share (in dollars per share) $ 1.90    
Successor | Restricted Stock and Performance Shares      
Potentially Dilutive Securities      
Antidilutive securities excluded from computation of earnings per share (in shares) 0    
Predecessor      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Basic loss   $ (324,107)  
Weighted Average Shares, Basic   689,784,000  
Basic loss per share (in dollars per share)   $ (0.47)  
Effect of dilutive securities      
Restricted stock   $ 0  
Restricted stock (in shares)   0  
Convertible preferred stock   $ 0  
Convertible preferred stock (in shares)   0  
Convertible senior unsecured notes   $ 0  
Convertible senior unsecured notes (in shares)   0  
Diluted loss   $ (324,107)  
Weighted average shares, diluted   689,784,000  
Diluted loss per share (in dollars per share)   $ (0.47)  
Predecessor | Convertible Debt | 8.125% Convertible Senior Notes due 2022      
Potentially Dilutive Securities      
Long-term debt, fixed interest rate   8.125% 8.125%
Predecessor | Convertible Debt | 7.5% Convertible Senior Notes due 2023      
Potentially Dilutive Securities      
Long-term debt, fixed interest rate   7.50% 7.50%
Predecessor | Restricted Stock and Units      
Potentially Dilutive Securities      
Antidilutive securities excluded from computation of earnings per share (in shares)   0  
Predecessor | Convertible Preferred Stock      
Potentially Dilutive Securities      
Antidilutive securities excluded from computation of earnings per share (in shares)   67,600,000  
Predecessor | Convertible senior unsecured notes | 8.125% Convertible Senior Notes due 2022      
Potentially Dilutive Securities      
Antidilutive securities excluded from computation of earnings per share (in shares)   38,500,000  
Predecessor | Convertible senior unsecured notes | 7.5% Convertible Senior Notes due 2023      
Potentially Dilutive Securities      
Antidilutive securities excluded from computation of earnings per share (in shares)   19,800,000  
Predecessor | 8.5% Convertible perpetual preferred stock      
Potentially Dilutive Securities      
Preferred stock, dividend rate, percentage   8.50%  
Predecessor | 7.0% Convertible perpetual preferred stock      
Potentially Dilutive Securities      
Preferred stock, dividend rate, percentage   7.00%