Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-18-191372-index-headers.html | 2018-06-13 13:01:46 | |
| 0001193125-18-191372-index.html | 2018-06-13 13:01:46 | |
| 0001193125-18-191372.txt | 2018-06-13 13:01:46 | |
 0001193125-18-191372-xbrl.zip | 160002 | 2018-06-13 13:01:46 |
| d598580d10q.htm | 677185 | 2018-06-13 13:01:46 |
| d598580dex106.htm | 103812 | 2018-06-13 13:01:46 |
| d598580dex311.htm | 6482 | 2018-06-13 13:01:46 |
| d598580dex312.htm | 6628 | 2018-06-13 13:01:46 |
| d598580dex321.htm | 2878 | 2018-06-13 13:01:46 |
| d598580dex322.htm | 2849 | 2018-06-13 13:01:46 |
| FilingSummary.xml | 45665 | 2018-06-13 13:01:46 |
| Financial_Report.xlsx | 74825 | 2018-06-13 13:01:46 |
| pery-20180505.xml | 1439234 | 2018-06-13 13:01:46 |
| pery-20180505.xsd | 52131 | 2018-06-13 13:01:46 |
| pery-20180505_cal.xml | 79329 | 2018-06-13 13:01:46 |
| pery-20180505_def.xml | 380482 | 2018-06-13 13:01:46 |
| pery-20180505_lab.xml | 402748 | 2018-06-13 13:01:46 |
| pery-20180505_pre.xml | 446450 | 2018-06-13 13:01:46 |
| R1.htm | 22066 | 2018-06-13 13:01:46 |
| R10.htm | 13543 | 2018-06-13 13:01:46 |
| R11.htm | 5644 | 2018-06-13 13:01:46 |
| R12.htm | 24243 | 2018-06-13 13:01:46 |
| R13.htm | 17132 | 2018-06-13 13:01:46 |
| R14.htm | 10919 | 2018-06-13 13:01:46 |
| R15.htm | 7284 | 2018-06-13 13:01:46 |
| R16.htm | 3840 | 2018-06-13 13:01:46 |
| R17.htm | 14769 | 2018-06-13 13:01:46 |
| R18.htm | 10790 | 2018-06-13 13:01:46 |
| R19.htm | 21867 | 2018-06-13 13:01:46 |
| R2.htm | 91971 | 2018-06-13 13:01:46 |
| R20.htm | 14873 | 2018-06-13 13:01:46 |
| R21.htm | 6273 | 2018-06-13 13:01:46 |
| R22.htm | 5002 | 2018-06-13 13:01:46 |
| R23.htm | 28288 | 2018-06-13 13:01:46 |
| R24.htm | 7874 | 2018-06-13 13:01:46 |
| R25.htm | 288669 | 2018-06-13 13:01:46 |
| R26.htm | 5229 | 2018-06-13 13:01:46 |
| R27.htm | 35646 | 2018-06-13 13:01:46 |
| R28.htm | 11401 | 2018-06-13 13:01:46 |
| R29.htm | 6238 | 2018-06-13 13:01:46 |
| R3.htm | 17468 | 2018-06-13 13:01:46 |
| R30.htm | 18888 | 2018-06-13 13:01:46 |
| R31.htm | 19089 | 2018-06-13 13:01:46 |
| R32.htm | 12554 | 2018-06-13 13:01:46 |
| R33.htm | 8153 | 2018-06-13 13:01:46 |
| R34.htm | 14262 | 2018-06-13 13:01:46 |
| R35.htm | 10769 | 2018-06-13 13:01:46 |
| R36.htm | 23425 | 2018-06-13 13:01:46 |
| R37.htm | 13794 | 2018-06-13 13:01:46 |
| R38.htm | 30176 | 2018-06-13 13:01:46 |
| R39.htm | 277208 | 2018-06-13 13:01:46 |
| R4.htm | 46817 | 2018-06-13 13:01:46 |
| R40.htm | 14643 | 2018-06-13 13:01:46 |
| R41.htm | 32271 | 2018-06-13 13:01:46 |
| R42.htm | 18074 | 2018-06-13 13:01:46 |
| R43.htm | 32397 | 2018-06-13 13:01:46 |
| R44.htm | 30449 | 2018-06-13 13:01:46 |
| R45.htm | 17863 | 2018-06-13 13:01:46 |
| R46.htm | 5161 | 2018-06-13 13:01:46 |
| R47.htm | 17636 | 2018-06-13 13:01:46 |
| R48.htm | 20768 | 2018-06-13 13:01:46 |
| R49.htm | 9102 | 2018-06-13 13:01:46 |
| R5.htm | 18587 | 2018-06-13 13:01:46 |
| R50.htm | 5157 | 2018-06-13 13:01:46 |
| R51.htm | 13021 | 2018-06-13 13:01:46 |
| R52.htm | 9681 | 2018-06-13 13:01:46 |
| R53.htm | 9380 | 2018-06-13 13:01:46 |
| R54.htm | 9534 | 2018-06-13 13:01:46 |
| R55.htm | 4575 | 2018-06-13 13:01:46 |
| R56.htm | 24002 | 2018-06-13 13:01:46 |
| R57.htm | 14652 | 2018-06-13 13:01:46 |
| R58.htm | 7827 | 2018-06-13 13:01:46 |
| R59.htm | 22429 | 2018-06-13 13:01:46 |
| R6.htm | 90037 | 2018-06-13 13:01:46 |
| R60.htm | 8301 | 2018-06-13 13:01:46 |
| R61.htm | 15205 | 2018-06-13 13:01:46 |
| R62.htm | 10246 | 2018-06-13 13:01:46 |
| R63.htm | 9740 | 2018-06-13 13:01:46 |
| R64.htm | 20785 | 2018-06-13 13:01:46 |
| R65.htm | 25456 | 2018-06-13 13:01:46 |
| R66.htm | 24603 | 2018-06-13 13:01:46 |
| R67.htm | 9051 | 2018-06-13 13:01:46 |
| R68.htm | 15198 | 2018-06-13 13:01:46 |
| R69.htm | 122884 | 2018-06-13 13:01:46 |
| R7.htm | 4836 | 2018-06-13 13:01:46 |
| R70.htm | 57961 | 2018-06-13 13:01:46 |
| R71.htm | 65950 | 2018-06-13 13:01:46 |
| R72.htm | 13420 | 2018-06-13 13:01:46 |
| R8.htm | 27748 | 2018-06-13 13:01:46 |
| R9.htm | 50676 | 2018-06-13 13:01:46 |
| report.css | 2767 | 2018-06-13 13:01:46 |
| Show.js | 1410 | 2018-06-13 13:01:46 |