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Net Income (Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted |
| Three months ended June 30, |  | Six months ended June 30,
In thousands except per share amounts | 2017 |  | 2016 |  | 2017 |  | 2016
Net income (loss) available to common stockholders | $ | (10,955 | ) |  | $ | 14,497 |  |  | $ | 7,708 |  |  | $ | (5,899 | )
Weighted average shares: |  |  |  |  |  |  |
Basic | 179,241 |  |  | 153,972 |  |  | 179,071 |  |  | 152,110 |
Effect of stock-based compensation plans | — |  |  | 3,928 |  |  | 4,049 |  |  | — |
Diluted | 179,241 |  |  | 157,900 |  |  | 183,120 |  |  | 152,110 |
Income (loss) per share: |  |  |  |  |  |  |
Basic | $ | (0.06 | ) |  | $ | 0.09 |  |  | $ | 0.04 |  |  | $ | (0.04 | )
Diluted | $ | (0.06 | ) |  | $ | 0.09 |  |  | $ | 0.04 |  |  | $ | (0.04 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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