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| 0000784977-17-000036-index.html | 2017-07-27 19:19:47 | |
| 0000784977-17-000036.txt | 2017-07-27 19:19:47 | |
 0000784977-17-000036-xbrl.zip | 193721 | 2017-07-27 19:19:47 |
| ex10110-q20170630.htm | 76883 | 2017-07-27 19:19:47 |
| ex31110-q20170630.htm | 15008 | 2017-07-27 19:19:47 |
| ex31210-q20170630.htm | 15075 | 2017-07-27 19:19:47 |
| ex3210-q20170630.htm | 13026 | 2017-07-27 19:19:47 |
| FilingSummary.xml | 25354 | 2017-07-27 19:19:47 |
| Financial_Report.xlsx | 66536 | 2017-07-27 19:19:47 |
| por-20170630.xml | 1561065 | 2017-07-27 19:19:47 |
| por-20170630.xsd | 45234 | 2017-07-27 19:19:47 |
| por-20170630_cal.xml | 92064 | 2017-07-27 19:19:47 |
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| por-20170630_lab.xml | 548389 | 2017-07-27 19:19:47 |
| por-20170630_pre.xml | 307714 | 2017-07-27 19:19:47 |
| por10-q20170630.htm | 1630647 | 2017-07-27 19:19:47 |
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| report.css | 2767 | 2017-07-27 19:19:47 |
| Show.js | 1410 | 2017-07-27 19:19:47 |