Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Components of Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss)     $ 49,410  
Successor [Member]        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss) $ 21,329   49,410  
Less: Preferred stock dividends 0   0  
Net loss attributable to common shareholders, Diluted $ 21,329   $ 49,410  
Weighted-average shares – basic 14,992   14,992  
Effect of dilutive securities 58   105  
Weighted-average shares – diluted 15,050   15,097  
Predecessor [Member]        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss)   $ (67,266)   $ (100,739)
Less: Preferred stock dividends   (2,820)   (5,972)
Net loss attributable to common shareholders, Diluted   $ (70,086)   $ (106,711)
Weighted-average shares – basic   89,051   87,496
Effect of dilutive securities   0   0
Weighted-average shares – diluted   89,051   87,496
Potentially dilutive securities with the effect of being anti-dilutive excluded from the calculation of diluted earnings per common share       26,600
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%