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|---|---|---|
 0000784977-21-000075-index-headers.html | 2021-10-29 08:58:01 | |
| 0000784977-21-000075-index.html | 2021-10-29 08:58:01 | |
| 0000784977-21-000075.txt | 2021-10-29 08:58:01 | |
 0000784977-21-000075-xbrl.zip | 35435 | 2021-10-29 08:58:01 |
| ex99120210930pressrelease.htm | 465668 | 2021-10-29 08:58:01 |
| FilingSummary.xml | 1694 | 2021-10-29 08:58:01 |
| Financial_Report.xlsx | 5654 | 2021-10-29 08:58:01 |
 imagea.jpg | 18768 | 2021-10-29 08:58:01 |
| MetaLinks.json | 17034 | 2021-10-29 08:58:01 |
| por-20211029.htm | 36783 | 2021-10-29 08:58:01 |
| por-20211029.xsd | 1932 | 2021-10-29 08:58:01 |
| por-20211029_htm.xml | 10646 | 2021-10-29 08:58:01 |
| por-20211029_lab.xml | 23970 | 2021-10-29 08:58:01 |
| por-20211029_pre.xml | 12659 | 2021-10-29 08:58:01 |
| q32021earningsslides_fin.htm | 14608 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin001.jpg | 138499 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin002.jpg | 216210 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin003.jpg | 63108 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin004.jpg | 93571 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin005.jpg | 96799 | 2021-10-29 08:58:01 |
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 q32021earningsslides_fin007.jpg | 106388 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin008.jpg | 68047 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin009.jpg | 58429 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin010.jpg | 130587 | 2021-10-29 08:58:01 |
 q32021earningsslides_fin011.jpg | 129455 | 2021-10-29 08:58:01 |
| R1.htm | 38604 | 2021-10-29 08:58:01 |
| report.css | 2767 | 2021-10-29 08:58:01 |
| Show.js | 1085 | 2021-10-29 08:58:01 |