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COMPUTATION OF EARNINGS PER SHARE (Tables) | 3 Months Ended
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Mar. 31, 2014
Earnings Per Share [Abstract] |
Calculation of Basic and Diluted Earnings Per Share | The calculation of basic and diluted earnings per share for the three month periods ended March 31, 2014 and 2013 was as follows:
|  | For the three month period ended March 31 |
|  | 2014 |  |  | 2013 |
Numerator |  |  |  |  |  |  |  |
Net income |  | $ | 2,738 |  |  | $ | 4,965 |
Denominator |  |  |  |  |  |  |  |
Determination of shares |  |  |  |  |  |  |  |
Weighted-average common shares outstanding |  |  | 5,392 |  |  |  | 5,377 |
Dilutive effect - share-based awards |  |  | 39 |  |  |  | 80 |
Diluted weighted-average common shares outstanding |  |  | 5,431 |  |  |  | 5,457 |
Earnings per common share attributable to PLPC shareholders |  |  |  |  |  |  |  |
Basic |  | $ | 0.51 |  |  | $ | 0.92 |
Diluted |  | $ | 0.50 |  |  | $ | 0.91 |

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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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