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| 0000722885-17-000057-index.html | 2017-02-10 09:42:13 | |
| 0000722885-17-000057.txt | 2017-02-10 09:42:13 | |
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| ptf-20170206_lab.xml | 161867 | 2017-02-10 09:42:13 |
| ptf-20170206_pre.xml | 694882 | 2017-02-10 09:42:13 |
| R1.htm | 54386 | 2017-02-10 09:42:13 |
| R10.htm | 99298 | 2017-02-10 09:42:13 |
| R11.htm | 190196 | 2017-02-10 09:42:13 |
| R12.htm | 85641 | 2017-02-10 09:42:13 |
| R13.htm | 171722 | 2017-02-10 09:42:13 |
| R18.htm | 16192 | 2017-02-10 09:42:13 |
| R2.htm | 110764 | 2017-02-10 09:42:13 |
| R3.htm | 210068 | 2017-02-10 09:42:13 |
| R4.htm | 103663 | 2017-02-10 09:42:13 |
| R5.htm | 191734 | 2017-02-10 09:42:13 |
| R6.htm | 106783 | 2017-02-10 09:42:13 |
| R7.htm | 207201 | 2017-02-10 09:42:13 |
| R8.htm | 103202 | 2017-02-10 09:42:13 |
| R9.htm | 194157 | 2017-02-10 09:42:13 |
| report.css | 2767 | 2017-02-10 09:42:13 |
| Show.js | 1410 | 2017-02-10 09:42:13 |
| xbrl.htm | 39151 | 2017-02-10 09:42:13 |