Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Schedule Of Earnings Per Share Reconciliation (Details)

v3.8.0.1
Earnings Per Share - Schedule Of Earnings Per Share Reconciliation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Basic:                      
Basic - Net (loss) income                 $ 435,152 $ (979,709) $ (1,224,884)
Basic - Weighted average common shares outstanding (shares)                 179,834,146 122,952,866 99,792,401
Basic - Net (loss) income per share (usd per share) $ 0.85 $ 0.10 $ 0.58 $ 0.91 $ (1.86) $ (1.25) $ (2.71) $ (2.17) $ 2.42 $ (7.97) $ (12.27)
Effect of dilutive securities:                      
Effect of dilutive securities - Stock options and awards                 $ 0 $ 0 $ 0
Effect of dilutive securities - Stock options and awards (shares)                 418,878    
Diluted:                      
Diluted - Net (loss) income                 $ 435,152 $ (979,709) $ (1,224,884)
Weighted average common shares outstanding - Diluted (shares)                 180,253,024 122,952,866 99,792,401
Diluted - Net (loss) income per share (usd per share) $ 0.85 $ 0.10 $ 0.58 $ 0.91 $ (1.86) $ (1.25) $ (2.71) $ (2.17) $ 2.41 $ (7.97) $ (12.27)
Anti-dilutive common shares excluded from calculation of earnings per share (shares)                 0 539,988 449,880