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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Components of Calculation of Basic and Diluted Earnings Per Share
The following table provides a reconciliation of the components used in the calculation of basic and diluted earnings per share utilizing the two-class method for the periods presented:
 
Successor
 
 
Predecessor
 
 
 
 
 
September 13 Through
 
 
January 1 Through
 
Year Ended December 31,
 
December 31,
 
 
September 12,
 
2018
 
2017
 
2016
 
 
2016
Net income (loss)
$
224,785

 
$
32,662

 
$
(5,296
)
 
 
$
1,054,602

Less: Preferred stock dividends
—

 
—

 
—

 
 
(5,972
)
Net income (loss) attributable to common shareholders – basic and diluted
$
224,785

 
$
32,662

 
$
(5,296
)
 
 
$
1,048,630

 
 
 
 
 
 
 
 
 
Weighted-average shares – basic
15,059

 
14,996

 
14,992

 
 
88,013

Effect of dilutive securities 1
233

 
67

 
—

 
 
36,074

Weighted-average shares – diluted
15,292

 
15,063

 
14,992

 
 
124,087

_____________________________________________
1 For the period from September 13, 2016 through December 31, 2016, less than 0.1 million potentially dilutive securities, represented by RSUs, had the effect of being anti-dilutive and were excluded from the calculation of diluted earnings per common share.