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Computation of Earnings Per Share | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Computation of Earnings Per Share | NOTE E – COMPUTATION OF EARNINGS PER SHARE Basic earnings per share were computed by dividing Net income by the weighted-average number of common shares outstanding for each respective period. Diluted earnings per share were calculated by dividing Net income by the weighted-average of all potentially dilutive common shares that were outstanding during the periods presented. The calculation of basic and diluted earnings per share for the three and nine month periods ended September 30, 2013 and 2012 were as follows:
|  | Three Month Period Ended September 30 |  |  | Nine Month Period Ended September 30 |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Net income |  | $ | 6,104 |  |  | $ | 9,284 |  |  | $ | 17,455 |  |  | $ | 24,013 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Determination of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares outstanding |  |  | 5,361 |  |  |  | 5,319 |  |  |  | 5,369 |  |  |  | 5,328 |
Dilutive effect—share-based awards |  |  | 88 |  |  |  | 112 |  |  |  | 81 |  |  |  | 104 |
Diluted weighted-average common shares outstanding |  |  | 5,449 |  |  |  | 5,431 |  |  |  | 5,450 |  |  |  | 5,432 |
Earnings per common share attributable to PLPC shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.14 |  |  | $ | 1.75 |  |  | $ | 3.25 |  |  | $ | 4.51 |
Diluted |  | $ | 1.12 |  |  | $ | 1.71 |  |  | $ | 3.20 |  |  | $ | 4.42 |
For the three and nine month period ended September 30, 2012, 22,500 and 17,750 stock options, respectively, were excluded from the calculation of diluted earnings per share due to the average market price being lower than the exercise price plus any unearned compensation on unvested options, and as such they were anti-dilutive. For the three and nine month periods ended September 30, 2012, zero and 3,496 restricted shares, respectively, were excluded from the calculation of diluted earnings per shares due to the average market price being lower than the date of grant fair value plus any unearned compensation on unvested options, and as such they were anti-dilutive.

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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 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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