Earnings (Loss) Per Share (EPS) - Summary of Reconciliation of Income and Number of Shares Used to Calculate Basic and Diluted Earnings per Share (EPS) (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Earnings Per Share [Abstract] | |||||||||||
| Basic earnings (loss) per common share | $ (29,599) | $ (21,217) | $ (31,127) | $ (39,809) | $ (48,929) | $ (46,228) | $ (39,822) | $ (95,835) | $ (121,752) | $ (230,814) | $ (95,073) |
| Diluted earnings (loss) per common share | $ (121,752) | $ (230,814) | $ (95,073) | ||||||||
| Basic earnings (loss) per common share (in shares) | 136,266,843 | 124,130,004 | 122,562,187 | ||||||||
| Diluted earnings (loss) per common share | 136,266,843 | 124,130,004 | 122,562,187 | ||||||||
| Basic earnings (loss) per common share (in dollars per share) | $ (0.21) | $ (0.15) | $ (0.23) | $ (0.31) | $ (0.39) | $ (0.37) | $ (0.32) | $ (0.78) | $ (0.89) | $ (1.86) | $ (0.78) |
| Restricted stock units (in shares) | 0 | 0 | 0 | ||||||||
| Restricted stock units (in dollars per share) | 0.00 | 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | ||||||
| Diluted earnings (loss) per common share (in dollars per share) | $ (0.21) | $ (0.15) | $ (0.23) | $ (0.31) | $ (0.39) | $ (0.37) | $ (0.32) | $ (0.78) | $ (0.89) | $ (1.86) | $ (0.78) |
| Shares excluded from the computation of diluted EPS | 23,809,500 | ||||||||||
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. No definition available.
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of shares of restricted stock determined by relating the portion of time within a reporting period that restricted shares have been outstanding to the total time in that period. Restricted shares are subject to sales, contractual, regulatory or other restrictions that prevent or inhibit the holder from freely disposing of them before the restriction ends. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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