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Earnings Per Share | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Earnings Per Share |
7. | 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 |  |  | 2015 |  |  |  | 2014 |  |  |  | 2013 |
Net income |  | $ | 64,575 |  |  | $ | 69,246 |  |  | $ | 67,158 |
Weighted average common shares outstanding used in basic EPS |  |  | 43,397 |  |  |  | 43,201 |  |  |  | 43,158 |
Common shares issuable upon exercise of dilutive stock options and PSAs / RSUs |  |  | 545 |  |  |  | 865 |  |  |  | 1,141 |
Weighted average common shares outstanding and common share equivalents used in diluted EPS |  |  | 43,942 |  |  |  | 44,066 |  |  |  | 44,299 |
Earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.49 |  |  | $ | 1.60 |  |  | $ | 1.56 |
Diluted |  |  | 1.47 |  |  |  | 1.57 |  |  |  | 1.52 |
The following table sets forth the potential common shares outstanding for stock options and restricted stock units 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 |  |  | 2015 |  |  |  | 2014 |  |  |  | 2013 |
Potential common shares |  |  | 678 |  |  |  | 277 |  |  |  | 7 |

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