Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

v3.10.0.1
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Preferred Stock
Common Stock
Paid-in Capital
Retained Earnings (Accumulated Deficit)
Deferred Compensation, Share-based Payments [Member]
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, Shares, Outstanding | Predecessor [Member]     81,253,000          
Balance as of beginning of period (Predecessor [Member]) at Dec. 31, 2015 $ (915,121) $ 3,146 $ 628 $ 1,211,088 $ (2,130,271) $ 3,440 $ 422 $ (3,574)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income (loss) | Predecessor [Member] 1,054,602       1,054,602      
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | Predecessor [Member]       1,511        
Stock Issued During Period, Value, Stock Options Exercised | Predecessor [Member] 1,511              
Other | Predecessor [Member]   1,266 $ (69) (1,198)     39  
Conversion of preferred stock (in shares) | Predecessor [Member]     6,965,000          
Conversion of preferred stock | Predecessor [Member] (38)              
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures 49,943              
Balance as of end of period (in shares) (Predecessor [Member]) at Sep. 12, 2016     88,218,000          
Balance as of end of period (Predecessor [Member]) at Sep. 12, 2016   0 $ 0 0 0 0 0 0
Balance as of end of period (Successor [Member]) at Sep. 12, 2016         0      
Balance as of end of period at Sep. 12, 2016 0              
Issuance of Common Stock, Backstop Fee | Successor [Member] 9,059              
Issuance of Common Stock, Exchange of Claims | Successor [Member] $ 131,893              
Postconfirmation, Shares outstanding | Successor [Member] 14,992,000              
Postconfirmation, Stockholders' Equity | Successor [Member] $ 190,895   $ 150 190,745 0 0 0 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, Shares, Outstanding | Predecessor [Member]     0          
Common Stock, Shares, Outstanding 14,992,018              
Cancellation of Equity Upon Emergence from Bankruptcy | Predecessor [Member]   (1,880) $ (697) (1,213,797) 1,075,669 (3,440) (383) 3,574
Cancellation of Equity Upon Emergence from Bankruptcy $ 882,992              
Cancellation of Total Equity Upon Emergence from Bankruptcy | Predecessor [Member] (140,954)              
Preconfirmation, Stockholders' Equity | Predecessor [Member] (1,035,831) (1,880) $ (697) (1,213,797) (1,075,669) (3,440) (383) (3,574)
Preconfirmation, Stockholders' Equity (140,954)              
Cancellation of Equity Upon Emergence from Bankruptcy, Shares | Predecessor [Member]     (88,218,000)          
Postconfirmation, Common Stock - Rights Offering, shares | Successor [Member]     7,634,000          
Postconfirmation, Common Stock - Rights Offering | Successor [Member]     $ 76          
Postconfirmation, Additional Paid-in Capital - Rights Offering | Successor [Member]     $ 49,867          
Postconfirmation, Common Stock - Backstop Fee, Shares | Successor [Member]     473,000          
Postconfirmation, Common Stock - Backstop Fee | Successor [Member]     $ 5          
Postconfirmation, Additional paid-in capital - Backstop Fee | Successor [Member]     $ 9,054          
Postconfirmation, Common Stock - Exchange of Claims,Shares | Successor [Member]     6,885,000          
Postconfirmation, Common Stock - Exchange of Claims | Successor [Member]     $ 69          
Postconfirmation, Additional paid-in capital - Exchange of Claims | Successor [Member]     131,824          
Net income (loss) | Successor [Member] (5,296)       (5,296)      
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | Successor [Member]       81        
Other | Successor [Member] 132     205 0 0 (73) 0
Balance as of end of period (Successor [Member]) at Dec. 31, 2016 185,548 0 $ 150 190,621 (5,296) 0 73 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, Shares, Outstanding | Successor [Member]     14,992,000          
Net income (loss) | Successor [Member] 32,662       32,662      
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | Successor [Member]       3,809        
Other | Successor [Member] 29     (44) 0 0 73 0
Restricted stock unit vesting (in shares) | Successor [Member]     27,000          
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | Successor [Member] (351)     (351)        
Balance as of end of period (Successor [Member]) at Dec. 31, 2017 221,639 0 $ 150 194,123 27,366 0 0 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, Shares, Outstanding | Successor [Member]     15,019,000          
Net income (loss) | Successor [Member] 224,785       224,785      
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | Successor [Member]       4,618        
Other | Successor [Member] (82)     0 2,659 0 (82) 0
Restricted stock unit vesting (in shares) | Successor [Member]     61,000          
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | Successor [Member] (1,110)     (1,111)        
Balance as of end of period (Successor [Member]) at Dec. 31, 2018 $ 447,355 $ 0 $ 151 $ 197,630 $ 249,492 $ 0 $ 82 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, Shares, Outstanding | Successor [Member]     15,080,000