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Net Income (Loss) Per Share (Tables) | 9 Months Ended
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Sep. 30, 2016
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted |
| Three months ended September 30, |  | Nine months ended September 30,
In thousands except per share amounts | 2016 |  | 2015 |  | 2016 |  | 2015
Net income (loss) available to common stockholders | $ | 69,557 |  |  | $ | (14,219 | ) |  | $ | 63,660 |  |  | $ | (64,185 | )
Weighted average shares: |  |  |  |  |  |  |
Basic | 161,039 |  |  | 135,247 |  |  | 155,108 |  |  | 124,478 |
Effect of stock-based compensation plans | 4,789 |  |  | — |  |  | 3,284 |  |  | — |
Diluted | 165,828 |  |  | 135,247 |  |  | 158,392 |  |  | 124,478 |
Income (loss) per share: |  |  |  |  |  |  |
Basic | $ | 0.43 |  |  | $ | (0.11 | ) |  | $ | 0.41 |  |  | $ | (0.52 | )
Diluted | $ | 0.42 |  |  | $ | (0.11 | ) |  | $ | 0.40 |  |  | $ | (0.52 | )

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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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