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Earnings Per Share | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Earnings Per Share |
6. | EARNINGS PER SHARE
The following table sets forth the details of basic and diluted earnings per share (EPS):
| Year ended December 31 |  |
In thousands, except per share |  | 2017 |  |  |  | 2016 |  |  | 2015 |  |
Net income | $ | 7,914 |  |  |  | $ | 21,554 |  |  | $ | 64,575 |  |
Weighted average common shares outstanding used in basic EPS |  | 43,609 |  |  |  |  | 43,558 |  |  |  | 43,397 |  |
Common shares issuable upon exercise of dilutive stock options and PSAs / RSUs |  | 830 |  |  |  |  | 571 |  |  |  | 545 |  |
Weighted average common shares outstanding and common share equivalents used in diluted EPS |  | 44,439 |  |  |  |  | 44,129 |  |  |  | 43,942 |  |
Earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 0.18 |  |  |  | $ | 0.49 |  |  | $ | 1.49 |  |
Diluted |  | 0.18 |  |  |  |  | 0.49 |  |  |  | 1.47 |  |
The following table sets forth the potential common shares outstanding for stock options that were not included in the computation of diluted EPS for the period indicated, because their effect would be anti-dilutive:
| Year ended December 31 |  |
In thousands | 2017 |  |  |  | 2016 |  |  | 2015 |  |
Potential common shares |  | 610 |  |  |  |  | 596 |  |  |  | 678 |  |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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