Equity and Earnings (Loss) Per Share - Reconciliation of Numerators and Denominators of Basic and Diluted Earnings (Loss) Per Share Computation (Detail) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
Feb. 09, 2018	Dec. 31, 2018	Dec. 31, 2017
Numerator for basic and diluted earnings (loss) per share
Net income (loss) available to common stockholders (numerator)	$ 521,007	$ (205,094)	$ (426,899)
Denominator
Weighted-average common shares outstanding (basic denominator)	37,374	4,891	36,761
Weighted-average common shares outstanding (dilutive denominator)	37,424	4,891	36,761
RSUs [Member]
Denominator
Effect of dilutive securities	50	0	0

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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