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Income (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule Of Computation Of Basic And Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted loss per share (in thousands, except per share amounts):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Net income (loss) | $ | 72,621 |  |  | $ | (45,835 | ) |  | $ | (39,911 | )
Less: Undistributed income allocated to participating securities (1) | 878 |  |  | — |  |  | — |
Net income (loss) attributable to common stockholders | 71,743 |  |  | (45,835 | ) |  | (39,911 | )
Plus: Net income effect of convertible securities | — |  |  | — |  |  | — |
Numerator for diluted income (loss) per common share | $ | 71,743 |  |  | $ | (45,835 | ) |  | $ | (39,911 | )
Basic weighted-average common stock shares outstanding | 45,543 |  |  | 42,349 |  |  | 37,678 |
Add dilutive effects of common stock equivalents (2) | 40 |  |  | — |  |  | — |
Diluted weighted-average common stock shares outstanding | 45,583 |  |  | 42,349 |  |  | 37,678 |
Basic income (loss) per common share | $ | 1.58 |  |  | $ | (1.08 | ) |  | $ | (1.06 | )
Diluted income (loss) per common share | $ | 1.57 |  |  | $ | (1.08 | ) |  | $ | (1.06 | )
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(1) | Participating securities includes restricted stock that has been issued but has not yet vested.
(2) | Entities with a net loss from continuing operations are prohibited from including potential common shares in the computation of diluted per share amounts. We have utilized the basic shares outstanding to calculate both basic and diluted loss per share for the years ended December 31, 2016 and 2015.

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