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|---|---|---|
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| 0000784977-17-000024-index.html | 2017-04-27 19:28:20 | |
| 0000784977-17-000024.txt | 2017-04-27 19:28:20 | |
 0000784977-17-000024-xbrl.zip | 190804 | 2017-04-27 19:28:20 |
| ex31110-q20170331.htm | 15009 | 2017-04-27 19:28:20 |
| ex31210-q20170331.htm | 15076 | 2017-04-27 19:28:20 |
| ex3210-q20170331.htm | 13144 | 2017-04-27 19:28:20 |
| FilingSummary.xml | 24788 | 2017-04-27 19:28:20 |
| Financial_Report.xlsx | 65480 | 2017-04-27 19:28:20 |
| por-20170331.xml | 1495531 | 2017-04-27 19:28:20 |
| por-20170331.xsd | 45060 | 2017-04-27 19:28:20 |
| por-20170331_cal.xml | 91809 | 2017-04-27 19:28:20 |
| por-20170331_def.xml | 254714 | 2017-04-27 19:28:20 |
| por-20170331_lab.xml | 548427 | 2017-04-27 19:28:20 |
| por-20170331_pre.xml | 305121 | 2017-04-27 19:28:20 |
| por10-q20170331.htm | 1362031 | 2017-04-27 19:28:20 |
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| R9.htm | 126811 | 2017-04-27 19:28:20 |
| report.css | 2767 | 2017-04-27 19:28:20 |
| Show.js | 1410 | 2017-04-27 19:28:20 |