Quarterly report pursuant to Section 13 or 15(d)

Components of Calculation of Basic and Diluted Earnings Per Share (Detail)

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Components of Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 8 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 12, 2016
Sep. 30, 2017
Sep. 12, 2016
Sep. 30, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Net income (loss)         $ 43,463
Successor [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount     55,000    
Net income (loss) $ (3,441)   $ (5,947)   43,463
Net loss attributable to common shareholders, Diluted $ (3,441)   $ (5,947)   $ 43,463
Weighted-average shares – basic 14,992,000   14,994,000   14,993,000
Effect of dilutive securities 0   0 [1]   69,000 [2]
Weighted-average shares – diluted 14,992,000   14,994,000   15,062,000
Preferred Stock Dividends and Other Adjustments $ 0   $ 0   $ 0
Net Income (Loss) Available to Common Stockholders, Basic $ (3,441)   $ (5,947)   $ 43,463
Predecessor [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Net income (loss)   $ 1,155,341   $ 1,054,602  
Net loss attributable to common shareholders, Diluted   $ 1,155,341   $ 1,048,630  
Weighted-average shares – basic   89,292,000   88,013,000  
Effect of dilutive securities   22,166,000   36,074,000  
Weighted-average shares – diluted   111,458,000   124,087,000  
Preferred Stock Dividends and Other Adjustments   $ 0   $ (5,972) [3]  
Net Income (Loss) Available to Common Stockholders, Basic   $ 1,155,341   $ 1,048,630  
Predecessor [Member] | Series A Preferred Stock          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Perpetual Preferred Stock, dividend rate (as a percent)       6.00%  
Predecessor [Member] | Series B Preferred Stock          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Perpetual Preferred Stock, dividend rate (as a percent)       6.00%  
[1] The number of dilutive securities for the three months ended September 30, 2017, which is attributable to RSUs and PRSUs, was determined under the “treasury stock” method. For the three months ended September 30, 2017, approximately 0.1 million of potentially dilutive securities attributable to RSUs had the effect of being anti-dilutive and were excluded from the calculation of diluted loss per common share.
[2] 2 The number of dilutive securities for the three and nine months ended September 30, 2017, which is attributable to RSUs and PRSUs, was determined under the “treasury stock” method.
[3] 1 Dividends attributable to our Series A 6% Convertible Perpetual Preferred Stock and Series B 6% Convertible Perpetual Preferred Stock (together, the “Series A and B Preferred Stock”) were excluded from the computation of diluted loss per share for the period from January 1, 2016 through September 12, 2016, as their assumed conversion would have been anti-dilutive.