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Income (Loss) Per Common Share - Computation of Basic and Diluted Net Income (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Numerator: |  |  |  |
Net income (loss) | $ (17,112) | $ 133,551 | $ (30,131) | $ 133,701
Adjustments for basic net income (loss) per common share: |  |  |  |
Dividend requirements | (75) | (75) | (225) | (225)
Net income attributable to participating securities |  | (1,920) |  | (1,718)
Net income (loss) attributable to common stockholders | $ (24,745) | $ 112,047 | $ (52,456) | $ 92,787
Denominator: |  |  |  |
Denominator for basic and dilutive net income (loss) per common share - adjusted weighted-average shares | 27,249,304 | 27,075,629 | 27,248,889 | 24,926,471
Basic net income (loss) per common share: |  |  |  |
Loss from continuing operations | $ (0.91) | $ (2.25) | $ (1.93) | $ (4.17)
Income from discontinued operations, net of taxes |  | 6.39 |  | 7.89
Net income (loss) | (0.91) | 4.14 | (1.93) | 3.72
Diluted net income (loss) per common share: |  |  |  |
Loss from continuing operations | (0.91) | (2.25) | (1.93) | (4.17)
Income from discontinued operations, net of taxes |  | 6.39 |  | 7.89
Net income (loss) | $ (0.91) | $ 4.14 | $ (1.93) | $ 3.72
Series E Redeemable Preferred Stock [Member] |  |  |  |
Adjustments for basic net income (loss) per common share: |  |  |  |
Dividend requirements on Series E Redeemable Preferred | $ (5,923) | $ (7,372) | $ (17,248) | $ (22,351)
Accretion of redeemable preferred stock | (1,635) | (12,137) | (4,852) | (16,620)
Series B Preferred Stock [Member] |  |  |  |
Adjustments for basic net income (loss) per common share: |  |  |  |
Dividend requirements | (60) | (60) | (180) | (180)
Series D Preferred Stock [Member] |  |  |  |
Adjustments for basic net income (loss) per common share: |  |  |  |
Dividend requirements | $ (15) | $ (15) | $ (45) | $ (45)

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