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Income (Loss) Per Share | 9 Months Ended
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Sep. 30, 2018
Income (Loss) Per Share | Note 8 — Income (Loss) Per Share The following table is a reconciliation of the weighted average shares used in the computation of income (loss) per share for the periods presented (in thousands, except per share data):
|  | Three Months Ended September 30, |
|  | 2018 |  |  | 2017 |
|  |  |  |  | Weighted |  |  |  |  |  |  |  |  | Weighted |  |  |  |
|  | Income |  |  | Average |  |  | Per- |  |  | Income |  |  | Average |  |  | Per- |
|  | (Loss) |  |  | Shares |  |  | Share |  |  | (Loss) |  |  | Shares |  |  | Share |
Income (loss) per share — basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) available to common stockholders |  | $ | 15,682 |  |  |  | 23,106 |  |  | $ | 0.68 |  |  | $ | (17,614 | ) |  |  | 22,772 |  |  | $ | (0.77 | )
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible senior notes |  |  | 1,487 |  |  |  | 21,426 |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |
Unvested performance stock grants |  |  | — |  |  |  | 832 |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |
Unvested restricted stock grants |  |  | — |  |  |  | 322 |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |
Income (loss) per share — diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) available to common stockholders plus assumed exercises and conversion |  | $ | 17,169 |  |  |  | 45,686 |  |  | $ | 0.38 |  |  | $ | (17,614 | ) |  |  | 22,772 |  |  | $ | (0.77 | )
|  | Nine Months Ended September 30, |
|  | 2018 |  |  | 2017 |
|  |  |  |  | Weighted |  |  |  |  |  |  |  |  | Weighted |  |  |  |
|  | Income |  |  | Average |  |  | Per- |  |  | Income |  |  | Average |  |  | Per- |
|  | (Loss) |  |  | Shares |  |  | Share |  |  | (Loss) |  |  | Shares |  |  | Share |
Income (loss) per share — basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) available to common stockholders |  | $ | (39,121 | ) |  |  | 23,104 |  |  | $ | (1.69 | ) |  | $ | (52,672 | ) |  |  | 20,848 |  |  | $ | (2.53 | )
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible senior notes |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |
Unvested performance stock grants |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |
Unvested restricted stock grants |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |
Income (loss) per share — diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) available to common stockholders plus assumed exercises and conversion |  | $ | (39,121 | ) |  |  | 23,104 |  |  | $ | (1.69 | ) |  | $ | (52,672 | ) |  |  | 20,848 |  |  | $ | (2.53 | )
Basic income (loss) per share is calculated using the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated using the weighted average number of common shares and common share equivalents outstanding during the period (which consist of warrants, options, restricted stock awards, restricted stock units and convertible debt to the extent they are dilutive). The weighted average number of common shares outstanding excludes shares repurchased pursuant to a prepaid forward share repurchase agreement associated with the issuance of the convertible senior notes due 2020. Common share equivalents that could potentially dilute basic earnings per share in the future, which were excluded from the computation of diluted earnings per share due to being anti-dilutive, totaled approximately 2,894,029 and 20,215,325 for the three months ended September 30, 2018 and 2017, respectively, and 25,332,390 and 21,502,935 for the nine months ended September 30, 2018 and 2017, respectively.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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