Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000784977-13-000025-index-headers.html | 2013-04-30 19:52:13 | |
| 0000784977-13-000025-index.html | 2013-04-30 19:52:13 | |
| 0000784977-13-000025.txt | 2013-04-30 19:52:13 | |
 0000784977-13-000025-xbrl.zip | 204738 | 2013-04-30 19:52:13 |
| ex31120130331.htm | 15019 | 2013-04-30 19:52:13 |
| ex31220130331.htm | 15152 | 2013-04-30 19:52:13 |
| ex3220130331.htm | 13425 | 2013-04-30 19:52:13 |
| FilingSummary.xml | 25610 | 2013-04-30 19:52:13 |
| Financial_Report.xls | 1554035 | 2013-04-30 19:52:13 |
| por-20130331.xml | 1815729 | 2013-04-30 19:52:13 |
| por-20130331.xsd | 58513 | 2013-04-30 19:52:13 |
| por-20130331_cal.xml | 101104 | 2013-04-30 19:52:13 |
| por-20130331_def.xml | 262597 | 2013-04-30 19:52:13 |
| por-20130331_lab.xml | 611424 | 2013-04-30 19:52:13 |
| por-20130331_pre.xml | 317076 | 2013-04-30 19:52:13 |
| por2013033110q.htm | 1374902 | 2013-04-30 19:52:13 |
| R1.htm | 28818 | 2013-04-30 19:52:13 |
| R10.htm | 23074 | 2013-04-30 19:52:13 |
| R11.htm | 73306 | 2013-04-30 19:52:13 |
| R12.htm | 55271 | 2013-04-30 19:52:13 |
| R13.htm | 7029 | 2013-04-30 19:52:13 |
| R14.htm | 8997 | 2013-04-30 19:52:13 |
| R15.htm | 13358 | 2013-04-30 19:52:13 |
| R16.htm | 9816 | 2013-04-30 19:52:13 |
| R17.htm | 27134 | 2013-04-30 19:52:13 |
| R18.htm | 9533 | 2013-04-30 19:52:13 |
| R19.htm | 18760 | 2013-04-30 19:52:13 |
| R2.htm | 81991 | 2013-04-30 19:52:13 |
| R20.htm | 7949 | 2013-04-30 19:52:13 |
| R21.htm | 8688 | 2013-04-30 19:52:13 |
| R22.htm | 158685 | 2013-04-30 19:52:13 |
| R23.htm | 228971 | 2013-04-30 19:52:13 |
| R24.htm | 226175 | 2013-04-30 19:52:13 |
| R25.htm | 20888 | 2013-04-30 19:52:13 |
| R26.htm | 64234 | 2013-04-30 19:52:13 |
| R27.htm | 23321 | 2013-04-30 19:52:13 |
| R28.htm | 12608 | 2013-04-30 19:52:13 |
| R29.htm | 19010 | 2013-04-30 19:52:13 |
| R3.htm | 160643 | 2013-04-30 19:52:13 |
| R30.htm | 15681 | 2013-04-30 19:52:13 |
| R31.htm | 45584 | 2013-04-30 19:52:13 |
| R32.htm | 24409 | 2013-04-30 19:52:13 |
| R33.htm | 29255 | 2013-04-30 19:52:13 |
| R34.htm | 41329 | 2013-04-30 19:52:13 |
| R35.htm | 69032 | 2013-04-30 19:52:13 |
| R36.htm | 19109 | 2013-04-30 19:52:13 |
| R37.htm | 16483 | 2013-04-30 19:52:13 |
| R38.htm | 21071 | 2013-04-30 19:52:13 |
| R39.htm | 43447 | 2013-04-30 19:52:13 |
| R4.htm | 27512 | 2013-04-30 19:52:13 |
| R40.htm | 12764 | 2013-04-30 19:52:13 |
| R41.htm | 41308 | 2013-04-30 19:52:13 |
| R42.htm | 7791 | 2013-04-30 19:52:13 |
| R43.htm | 11986 | 2013-04-30 19:52:13 |
| R44.htm | 29430 | 2013-04-30 19:52:13 |
| R45.htm | 15498 | 2013-04-30 19:52:13 |
| R46.htm | 29376 | 2013-04-30 19:52:13 |
| R47.htm | 38531 | 2013-04-30 19:52:13 |
| R48.htm | 43474 | 2013-04-30 19:52:13 |
| R49.htm | 8327 | 2013-04-30 19:52:13 |
| R5.htm | 136367 | 2013-04-30 19:52:13 |
| R6.htm | 21700 | 2013-04-30 19:52:13 |
| R7.htm | 151503 | 2013-04-30 19:52:13 |
| R8.htm | 243459 | 2013-04-30 19:52:13 |
| R9.htm | 223338 | 2013-04-30 19:52:13 |
| report.css | 2721 | 2013-04-30 19:52:13 |
| Show.js | 6423 | 2013-04-30 19:52:13 |