Common Stock and Loss Per Share (As Restated) - Reconciliation of Numerators and Denominators of Basic and Diluted Loss Per Share Computation (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Basic and diluted loss per share
Net loss available to common stockholders (numerator)	$ (833,858)	$ (263,190)	$ (110,328)
Weighted-average common shares outstanding (denominator)	35,973,000	37,578,000	37,631,000
Basic and diluted loss per common and common equivalent share	$ (23.18)	$ (7.00)	$ (2.93)

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

No definition available.

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Period Type:	duration