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
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Net income (loss) $ 28,407  
Weighted-average shares – basic   85,941
Effect of dilutive securities   0
Successor [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Net income (loss) 28,407  
Less: Preferred stock dividends 0  
Net income (loss) attributable to common shareholders, Basic 28,407  
Net loss attributable to common shareholders, Diluted $ 28,407  
Weighted-average shares – basic 14,992  
Effect of dilutive securities 134  
Weighted-average shares – diluted 15,126  
Predecessor [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Net income (loss)   $ (33,473)
Less: Preferred stock dividends   (3,152)
Net income (loss) attributable to common shareholders, Basic   (36,625)
Net loss attributable to common shareholders, Diluted   $ (36,625)
Weighted-average shares – basic   85,941
Weighted-average shares – diluted   85,941
Potentially dilutive securities with the effect of being anti-dilutive excluded from the calculation of diluted earnings per common share   27,600
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%