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|---|---|---|
 0001193125-17-221747-index-headers.html | 2017-07-05 12:13:21 | |
| 0001193125-17-221747-index.html | 2017-07-05 12:13:21 | |
| 0001193125-17-221747.txt | 2017-07-05 12:13:21 | |
 0001193125-17-221747-xbrl.zip | 50035 | 2017-07-05 12:13:21 |
| d363844d10q.htm | 304677 | 2017-07-05 12:13:21 |
| d363844dex1010.htm | 40875 | 2017-07-05 12:13:21 |
| d363844dex1011.htm | 1019511 | 2017-07-05 12:13:21 |
| d363844dex1012.htm | 7922 | 2017-07-05 12:13:21 |
| d363844dex1013.htm | 6223 | 2017-07-05 12:13:21 |
| d363844dex104.htm | 14225 | 2017-07-05 12:13:21 |
| d363844dex105.htm | 22613 | 2017-07-05 12:13:21 |
| d363844dex106.htm | 22776 | 2017-07-05 12:13:21 |
| d363844dex107.htm | 17888 | 2017-07-05 12:13:21 |
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| d363844dex109.htm | 42701 | 2017-07-05 12:13:21 |
| d363844dex311.htm | 9571 | 2017-07-05 12:13:21 |
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| d363844dex321.htm | 5421 | 2017-07-05 12:13:21 |
| FilingSummary.xml | 14959 | 2017-07-05 12:13:21 |
| Financial_Report.xlsx | 29298 | 2017-07-05 12:13:21 |
 g363844dsp035.jpg | 14071 | 2017-07-05 12:13:21 |
| pir-20170527.xml | 169923 | 2017-07-05 12:13:21 |
| pir-20170527.xsd | 19806 | 2017-07-05 12:13:21 |
| pir-20170527_cal.xml | 42204 | 2017-07-05 12:13:21 |
| pir-20170527_def.xml | 53980 | 2017-07-05 12:13:21 |
| pir-20170527_lab.xml | 187098 | 2017-07-05 12:13:21 |
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| R1.htm | 21938 | 2017-07-05 12:13:21 |
| R10.htm | 7335 | 2017-07-05 12:13:21 |
| R11.htm | 9528 | 2017-07-05 12:13:21 |
| R12.htm | 13068 | 2017-07-05 12:13:21 |
| R13.htm | 7130 | 2017-07-05 12:13:21 |
| R14.htm | 9694 | 2017-07-05 12:13:21 |
| R15.htm | 15070 | 2017-07-05 12:13:21 |
| R16.htm | 12065 | 2017-07-05 12:13:21 |
| R17.htm | 14679 | 2017-07-05 12:13:21 |
| R18.htm | 11123 | 2017-07-05 12:13:21 |
| R19.htm | 5482 | 2017-07-05 12:13:21 |
| R2.htm | 47319 | 2017-07-05 12:13:21 |
| R20.htm | 23573 | 2017-07-05 12:13:21 |
| R21.htm | 36673 | 2017-07-05 12:13:21 |
| R22.htm | 51735 | 2017-07-05 12:13:21 |
| R23.htm | 14343 | 2017-07-05 12:13:21 |
| R24.htm | 9559 | 2017-07-05 12:13:21 |
| R3.htm | 17862 | 2017-07-05 12:13:21 |
| R4.htm | 67730 | 2017-07-05 12:13:21 |
| R5.htm | 16881 | 2017-07-05 12:13:21 |
| R6.htm | 65809 | 2017-07-05 12:13:21 |
| R7.htm | 39438 | 2017-07-05 12:13:21 |
| R8.htm | 4344 | 2017-07-05 12:13:21 |
| R9.htm | 16087 | 2017-07-05 12:13:21 |
| report.css | 2767 | 2017-07-05 12:13:21 |
| Show.js | 1410 | 2017-07-05 12:13:21 |