Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000784977-20-000029-index-headers.html | 2020-04-24 09:02:24 | |
| 0000784977-20-000029-index.html | 2020-04-24 09:02:24 | |
| 0000784977-20-000029.txt | 2020-04-24 09:02:24 | |
 0000784977-20-000029-xbrl.zip | 18820 | 2020-04-24 09:02:24 |
| a8-k20200331pressrelea.htm | 54012 | 2020-04-24 09:02:24 |
| a8-k20200331pressrelea_htm.xml | 6156 | 2020-04-24 09:02:24 |
| ex99120200331pressrele.htm | 337201 | 2020-04-24 09:02:24 |
| FilingSummary.xml | 1834 | 2020-04-24 09:02:24 |
| Financial_Report.xlsx | 5847 | 2020-04-24 09:02:24 |
 logoa05.jpg | 12600 | 2020-04-24 09:02:24 |
| MetaLinks.json | 21298 | 2020-04-24 09:02:24 |
| por-20200424.xsd | 4460 | 2020-04-24 09:02:24 |
| por-20200424_cal.xml | 633 | 2020-04-24 09:02:24 |
| por-20200424_def.xml | 6148 | 2020-04-24 09:02:24 |
| por-20200424_lab.xml | 32723 | 2020-04-24 09:02:24 |
| por-20200424_pre.xml | 16895 | 2020-04-24 09:02:24 |
| q12020earningsslidesfina.htm | 17597 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina001.jpg | 65194 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina002.jpg | 263795 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina003.jpg | 76832 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina004.jpg | 84211 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina005.jpg | 153038 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina006.jpg | 148350 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina007.jpg | 76924 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina008.jpg | 117295 | 2020-04-24 09:02:24 |
 q12020earningsslidesfina009.jpg | 87106 | 2020-04-24 09:02:24 |
| R1.htm | 40492 | 2020-04-24 09:02:24 |
| report.css | 2767 | 2020-04-24 09:02:24 |
| Show.js | 1085 | 2020-04-24 09:02:24 |