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Consolidated Statements of Changes in Stockholders Equity (Deficit) - USD ($)
shares in Thousands, $ in Thousands
Total
Convertible Perpetual Preferred Stock
Common Stock
Warrants
Additional Paid-In Capital
Treasury Stock
Accumulated Deficit
Non-controlling Interest
Beginning Balance (in shares) (Predecessor) at Dec. 31, 2014   5,650            
Beginning Balance (in shares) (Predecessor) at Dec. 31, 2014     484,819          
Beginning Balance (Predecessor) at Dec. 31, 2014 $ 3,209,820 $ 6 $ 477   $ 5,201,524 $ (6,980) $ (3,257,202) $ 1,271,995
Increase (Decrease) in Stockholders' Equity                
Distributions to noncontrolling interest owners | Predecessor (138,305)             (138,305)
Stock distributions, net of purchases - retirement plans (in shares) | Predecessor     (1,000)          
Stock distributions, net of purchases - retirement plans | Predecessor 322       (916) 1,238    
Stock-based compensation | Predecessor 21,123       21,123      
Cash paid for tax withholdings on vested stock awards | Predecessor (2,428)       (2,428)      
Common stock issued for debt | Predecessor 1,250       1,250      
Issuance (cancellation) of restricted stock awards, net (in shares) | Predecessor     1,514          
Issuance (cancellations) of restricted stock awards, net | Predecessor 0   $ 5   (5)      
Common stock issued for debt (in shares) | Predecessor     120,881          
Common stock issued for debt | Predecessor 63,299   $ 121   63,178      
Common stock issued for preferred stock (in shares) | Predecessor   (230) 2,968          
Common stock issued for preferred stock or warrants | Predecessor 0   $ 3   (3)      
Net (loss) income | Predecessor (4,321,051)           (3,697,545) (623,506)
Convertible perpetual preferred stock dividends (in shares) | Predecessor     24,289          
Convertible perpetual preferred stock dividends | Predecessor (21,763)   $ 24   16,163   (37,950)  
Ending Balance (in shares) (Predecessor) at Dec. 31, 2015   5,420            
Ending Balance (in shares) (Predecessor) at Dec. 31, 2015     633,471          
Ending Balance (Predecessor) at Dec. 31, 2015 (1,187,733) $ 6 $ 630   5,299,886 (5,742) (6,992,697) 510,184
Increase (Decrease) in Stockholders' Equity                
Cumulative effect of adoption of ASU 2015-02 | Predecessor (253,124)           257,081 (510,205)
Stock distributions, net of purchases - retirement plans (in shares) | Predecessor     603          
Stock distributions, net of purchases - retirement plans | Predecessor (336)       (860) 524    
Stock-based compensation | Predecessor 11,102       11,102      
Cash paid for tax withholdings on vested stock awards | Predecessor (44)       (44)      
Issuance (cancellation) of restricted stock awards, net (in shares) | Predecessor     (2,184)          
Issuance (cancellations) of restricted stock awards, net | Predecessor 0   $ 2   (2)      
Common stock issued for debt (in shares) | Predecessor     84,390          
Common stock issued for debt | Predecessor 4,409   $ 84   4,325      
Common stock issued for preferred stock (in shares) | Predecessor   (173) 2,220          
Common stock issued for preferred stock or warrants | Predecessor 0   $ 2   (2)      
Net (loss) income | Predecessor 1,440,797           1,440,797  
Convertible perpetual preferred stock dividends | Predecessor $ (16,321)           (16,321)  
Ending Balance (in shares) (Predecessor) at Oct. 01, 2016   0            
Ending Balance (in shares) (Predecessor) at Oct. 01, 2016     0 0        
Ending Balance (in shares) (Successor) at Oct. 01, 2016 19,371   18,932 6,442        
Ending Balance (Predecessor) at Oct. 01, 2016 $ 0 $ 0 $ 0 $ 0 0 0 0 0
Ending Balance (Successor) at Oct. 01, 2016 827,424   $ 19 88,382 739,023   0  
Increase (Decrease) in Stockholders' Equity                
Cancellation of Predecessor equity (in shares) | Predecessor   (5,247) (718,500)          
Cancellation of Predecessor equity | Predecessor 1,250 $ (6) $ (718)   (5,314,405) $ 5,218 5,311,140 $ 21
Stock-based compensation | Successor 6,581       6,581      
Cash paid for tax withholdings on vested stock awards | Successor (110)       (110)      
Issuance of stock awards, net of cancellations (in shares) | Successor     10          
Issuance of stock awards, net of cancellations | Successor 0   $ 0   0      
Common stock issued for debt (in shares) | Successor     693          
Common stock issued for debt | Successor 13,001   $ 1   13,000      
Common stock issued for preferred stock or warrants | Successor 3     $ (1) 4      
Net (loss) income | Successor $ (333,982)           (333,982)  
Ending Balance (in shares) (Successor) at Dec. 31, 2016 19,635   19,635 6,442        
Ending Balance (Successor) at Dec. 31, 2016 $ 512,917   $ 20 $ 88,381 758,498   (333,982)  
Increase (Decrease) in Stockholders' Equity                
Stock-based compensation | Successor 17,912       17,912      
Cash paid for tax withholdings on vested stock awards | Successor (6,730)       (6,730)      
Issuance of stock awards, net of cancellations (in shares) | Successor     1,583          
Issuance of stock awards, net of cancellations | Successor 0   $ 2   (2)      
Common stock issued for debt (in shares) | Successor     14,328          
Common stock issued for debt | Successor 268,779   $ 14   268,765      
Net (loss) income | Successor 47,062           47,062  
Issuance of common stock (in shares) | Successor     104          
Issuance of common stock | Successor 0              
Issuance of Successor warrants (in shares) | Predecessor       128        
Issuance of Successor warrants | Predecessor       $ 119        
Issuance of Successor warrants | Successor $ 0       (119)      
Ending Balance (in shares) (Successor) at Dec. 31, 2017 35,650   35,650 6,570        
Ending Balance (Successor) at Dec. 31, 2017 $ 839,940   $ 36 $ 88,500 $ 1,038,324   $ (286,920)