Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000077159-21-000016-index-headers.html | 2021-03-09 13:19:45 | |
| 0000077159-21-000016-index.html | 2021-03-09 13:19:45 | |
| 0000077159-21-000016.txt | 2021-03-09 13:19:45 | |
 0000077159-21-000016-xbrl.zip | 781738 | 2021-03-09 13:19:45 |
| FilingSummary.xml | 41041 | 2021-03-09 13:19:45 |
| Financial_Report.xlsx | 126511 | 2021-03-09 13:19:45 |
| MetaLinks.json | 827089 | 2021-03-09 13:19:45 |
| pva-20201231.htm | 3408841 | 2021-03-09 13:19:45 |
| pva-20201231.xsd | 77603 | 2021-03-09 13:19:45 |
| pva-20201231xex1014.htm | 9200 | 2021-03-09 13:19:45 |
| pva-20201231xex211.htm | 8260 | 2021-03-09 13:19:45 |
| pva-20201231xex231.htm | 2536 | 2021-03-09 13:19:45 |
| pva-20201231xex232.htm | 6316 | 2021-03-09 13:19:45 |
| pva-20201231xex311.htm | 9184 | 2021-03-09 13:19:45 |
| pva-20201231xex312.htm | 9177 | 2021-03-09 13:19:45 |
| pva-20201231xex321.htm | 5450 | 2021-03-09 13:19:45 |
| pva-20201231xex322.htm | 5287 | 2021-03-09 13:19:45 |
| pva-20201231xex41.htm | 29574 | 2021-03-09 13:19:45 |
| pva-20201231xex991.htm | 65962 | 2021-03-09 13:19:45 |
| pva-20201231_cal.xml | 86176 | 2021-03-09 13:19:45 |
| pva-20201231_def.xml | 455161 | 2021-03-09 13:19:45 |
 pva-20201231_g1.jpg | 264438 | 2021-03-09 13:19:45 |
 pva-20201231_g2.jpg | 52466 | 2021-03-09 13:19:45 |
| pva-20201231_htm.xml | 1911622 | 2021-03-09 13:19:45 |
| pva-20201231_lab.xml | 901759 | 2021-03-09 13:19:45 |
| pva-20201231_pre.xml | 621894 | 2021-03-09 13:19:45 |
| R1.htm | 65208 | 2021-03-09 13:19:45 |
| R10.htm | 33484 | 2021-03-09 13:19:45 |
| R11.htm | 26359 | 2021-03-09 13:19:45 |
| R12.htm | 39510 | 2021-03-09 13:19:45 |
| R13.htm | 137978 | 2021-03-09 13:19:45 |
| R14.htm | 19423 | 2021-03-09 13:19:45 |
| R15.htm | 15108 | 2021-03-09 13:19:45 |
| R16.htm | 37435 | 2021-03-09 13:19:45 |
| R17.htm | 71421 | 2021-03-09 13:19:45 |
| R18.htm | 41272 | 2021-03-09 13:19:45 |
| R19.htm | 71287 | 2021-03-09 13:19:45 |
| R2.htm | 85540 | 2021-03-09 13:19:45 |
| R20.htm | 55749 | 2021-03-09 13:19:45 |
| R21.htm | 24915 | 2021-03-09 13:19:45 |
| R22.htm | 7691 | 2021-03-09 13:19:45 |
| R23.htm | 34292 | 2021-03-09 13:19:45 |
| R24.htm | 17508 | 2021-03-09 13:19:45 |
| R25.htm | 15874 | 2021-03-09 13:19:45 |
| R26.htm | 83904 | 2021-03-09 13:19:45 |
| R27.htm | 20844 | 2021-03-09 13:19:45 |
| R28.htm | 36569 | 2021-03-09 13:19:45 |
| R29.htm | 136294 | 2021-03-09 13:19:45 |
| R3.htm | 23108 | 2021-03-09 13:19:45 |
| R30.htm | 16375 | 2021-03-09 13:19:45 |
| R31.htm | 14921 | 2021-03-09 13:19:45 |
| R32.htm | 22116 | 2021-03-09 13:19:45 |
| R33.htm | 69806 | 2021-03-09 13:19:45 |
| R34.htm | 43316 | 2021-03-09 13:19:45 |
| R35.htm | 46095 | 2021-03-09 13:19:45 |
| R36.htm | 17752 | 2021-03-09 13:19:45 |
| R37.htm | 32363 | 2021-03-09 13:19:45 |
| R38.htm | 17032 | 2021-03-09 13:19:45 |
| R39.htm | 15451 | 2021-03-09 13:19:45 |
| R4.htm | 76847 | 2021-03-09 13:19:45 |
| R40.htm | 102455 | 2021-03-09 13:19:45 |
| R41.htm | 15359 | 2021-03-09 13:19:45 |
| R42.htm | 7624 | 2021-03-09 13:19:45 |
| R43.htm | 72520 | 2021-03-09 13:19:45 |
| R44.htm | 36918 | 2021-03-09 13:19:45 |
| R45.htm | 69481 | 2021-03-09 13:19:45 |
| R46.htm | 20646 | 2021-03-09 13:19:45 |
| R47.htm | 74266 | 2021-03-09 13:19:45 |
| R48.htm | 14954 | 2021-03-09 13:19:45 |
| R49.htm | 36189 | 2021-03-09 13:19:45 |
| R5.htm | 88803 | 2021-03-09 13:19:45 |
| R50.htm | 39706 | 2021-03-09 13:19:45 |
| R51.htm | 14883 | 2021-03-09 13:19:45 |
| R52.htm | 24851 | 2021-03-09 13:19:45 |
| R53.htm | 80742 | 2021-03-09 13:19:45 |
| R54.htm | 23951 | 2021-03-09 13:19:45 |
| R55.htm | 30757 | 2021-03-09 13:19:45 |
| R56.htm | 36235 | 2021-03-09 13:19:45 |
| R57.htm | 36362 | 2021-03-09 13:19:45 |
| R58.htm | 66645 | 2021-03-09 13:19:45 |
| R59.htm | 50349 | 2021-03-09 13:19:45 |
| R6.htm | 49517 | 2021-03-09 13:19:45 |
| R60.htm | 41447 | 2021-03-09 13:19:45 |
| R61.htm | 26366 | 2021-03-09 13:19:45 |
| R62.htm | 35759 | 2021-03-09 13:19:45 |
| R63.htm | 24615 | 2021-03-09 13:19:45 |
| R64.htm | 71623 | 2021-03-09 13:19:45 |
| R65.htm | 38998 | 2021-03-09 13:19:45 |
| R66.htm | 62010 | 2021-03-09 13:19:45 |
| R67.htm | 17116 | 2021-03-09 13:19:45 |
| R68.htm | 18975 | 2021-03-09 13:19:45 |
| R7.htm | 15232 | 2021-03-09 13:19:45 |
| R8.htm | 5458 | 2021-03-09 13:19:45 |
| R9.htm | 24608 | 2021-03-09 13:19:45 |
| report.css | 2767 | 2021-03-09 13:19:45 |
| Show.js | 1085 | 2021-03-09 13:19:45 |