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| 0000320575-18-000009-index.html | 2018-02-16 08:32:28 | |
| 0000320575-18-000009.txt | 2018-02-16 08:32:28 | |
 0000320575-18-000009-xbrl.zip | 382585 | 2018-02-16 08:32:28 |
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 a3yrspotprices2017.jpg | 72161 | 2018-02-16 08:32:28 |
| exhibit121-fixedchargesrat.htm | 70949 | 2018-02-16 08:32:28 |
| exhibit211-subsidiariesq42.htm | 14957 | 2018-02-16 08:32:28 |
| exhibit231-consentq42017.htm | 9792 | 2018-02-16 08:32:28 |
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| exhibit3224q2017.htm | 6035 | 2018-02-16 08:32:28 |
| FilingSummary.xml | 49608 | 2018-02-16 08:32:28 |
| Financial_Report.xlsx | 124381 | 2018-02-16 08:32:28 |
| form10k-q42017.htm | 3100086 | 2018-02-16 08:32:28 |
| pes-20171231.xml | 4082943 | 2018-02-16 08:32:28 |
| pes-20171231.xsd | 89242 | 2018-02-16 08:32:28 |
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| report.css | 2767 | 2018-02-16 08:32:28 |
| Show.js | 1410 | 2018-02-16 08:32:28 |
 tsrperformancegraph.jpg | 85455 | 2018-02-16 08:32:28 |