Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001031203-18-000036-index-headers.html | 2018-11-01 15:03:12 | |
| 0001031203-18-000036-index.html | 2018-11-01 15:03:12 | |
| 0001031203-18-000036.txt | 2018-11-01 15:03:12 | |
 0001031203-18-000036-xbrl.zip | 349330 | 2018-11-01 15:03:12 |
| a2018q3exhibit101.htm | 45058 | 2018-11-01 15:03:12 |
| a2018q3exhibit311.htm | 12256 | 2018-11-01 15:03:12 |
| a2018q3exhibit312.htm | 12244 | 2018-11-01 15:03:12 |
| a2018q3exhibit321.htm | 6122 | 2018-11-01 15:03:12 |
| a2018q3exhibit322.htm | 6077 | 2018-11-01 15:03:12 |
| a2018q3form10-q.htm | 5244326 | 2018-11-01 15:03:12 |
| FilingSummary.xml | 45207 | 2018-11-01 15:03:12 |
| Financial_Report.xlsx | 123399 | 2018-11-01 15:03:12 |
| gpi-20180930.xml | 4274461 | 2018-11-01 15:03:12 |
| gpi-20180930.xsd | 64462 | 2018-11-01 15:03:12 |
| gpi-20180930_cal.xml | 111944 | 2018-11-01 15:03:12 |
| gpi-20180930_def.xml | 381399 | 2018-11-01 15:03:12 |
| gpi-20180930_lab.xml | 806955 | 2018-11-01 15:03:12 |
| gpi-20180930_pre.xml | 536124 | 2018-11-01 15:03:12 |
| R1.htm | 24083 | 2018-11-01 15:03:12 |
| R10.htm | 240109 | 2018-11-01 15:03:12 |
| R11.htm | 10762 | 2018-11-01 15:03:12 |
| R12.htm | 54194 | 2018-11-01 15:03:12 |
| R13.htm | 27820 | 2018-11-01 15:03:12 |
| R14.htm | 59522 | 2018-11-01 15:03:12 |
| R15.htm | 12997 | 2018-11-01 15:03:12 |
| R16.htm | 71944 | 2018-11-01 15:03:12 |
| R17.htm | 19936 | 2018-11-01 15:03:12 |
| R18.htm | 39646 | 2018-11-01 15:03:12 |
| R19.htm | 31667 | 2018-11-01 15:03:12 |
| R2.htm | 76473 | 2018-11-01 15:03:12 |
| R20.htm | 12061 | 2018-11-01 15:03:12 |
| R21.htm | 59726 | 2018-11-01 15:03:12 |
| R22.htm | 71581 | 2018-11-01 15:03:12 |
| R23.htm | 100006 | 2018-11-01 15:03:12 |
| R24.htm | 720013 | 2018-11-01 15:03:12 |
| R25.htm | 64784 | 2018-11-01 15:03:12 |
| R26.htm | 134823 | 2018-11-01 15:03:12 |
| R27.htm | 228673 | 2018-11-01 15:03:12 |
| R28.htm | 44901 | 2018-11-01 15:03:12 |
| R29.htm | 16755 | 2018-11-01 15:03:12 |
| R3.htm | 10921 | 2018-11-01 15:03:12 |
| R30.htm | 58545 | 2018-11-01 15:03:12 |
| R31.htm | 72827 | 2018-11-01 15:03:12 |
| R32.htm | 25802 | 2018-11-01 15:03:12 |
| R33.htm | 23826 | 2018-11-01 15:03:12 |
| R34.htm | 59725 | 2018-11-01 15:03:12 |
| R35.htm | 71159 | 2018-11-01 15:03:12 |
| R36.htm | 99815 | 2018-11-01 15:03:12 |
| R37.htm | 721279 | 2018-11-01 15:03:12 |
| R38.htm | 14300 | 2018-11-01 15:03:12 |
| R39.htm | 4321 | 2018-11-01 15:03:12 |
| R4.htm | 58068 | 2018-11-01 15:03:12 |
| R40.htm | 9166 | 2018-11-01 15:03:12 |
| R41.htm | 11723 | 2018-11-01 15:03:12 |
| R42.htm | 4355 | 2018-11-01 15:03:12 |
| R43.htm | 11364 | 2018-11-01 15:03:12 |
| R44.htm | 33905 | 2018-11-01 15:03:12 |
| R45.htm | 37059 | 2018-11-01 15:03:12 |
| R46.htm | 62185 | 2018-11-01 15:03:12 |
| R47.htm | 25047 | 2018-11-01 15:03:12 |
| R48.htm | 45518 | 2018-11-01 15:03:12 |
| R49.htm | 16069 | 2018-11-01 15:03:12 |
| R5.htm | 29877 | 2018-11-01 15:03:12 |
| R50.htm | 15907 | 2018-11-01 15:03:12 |
| R51.htm | 30287 | 2018-11-01 15:03:12 |
| R52.htm | 25087 | 2018-11-01 15:03:12 |
| R53.htm | 35270 | 2018-11-01 15:03:12 |
| R54.htm | 23955 | 2018-11-01 15:03:12 |
| R55.htm | 19142 | 2018-11-01 15:03:12 |
| R56.htm | 16325 | 2018-11-01 15:03:12 |
| R57.htm | 37085 | 2018-11-01 15:03:12 |
| R58.htm | 24002 | 2018-11-01 15:03:12 |
| R59.htm | 57812 | 2018-11-01 15:03:12 |
| R6.htm | 10075 | 2018-11-01 15:03:12 |
| R60.htm | 34466 | 2018-11-01 15:03:12 |
| R61.htm | 58356 | 2018-11-01 15:03:12 |
| R62.htm | 17819 | 2018-11-01 15:03:12 |
| R63.htm | 6240 | 2018-11-01 15:03:12 |
| R64.htm | 22570 | 2018-11-01 15:03:12 |
| R65.htm | 26767 | 2018-11-01 15:03:12 |
| R66.htm | 7427 | 2018-11-01 15:03:12 |
| R67.htm | 90415 | 2018-11-01 15:03:12 |
| R68.htm | 4106 | 2018-11-01 15:03:12 |
| R69.htm | 38472 | 2018-11-01 15:03:12 |
| R7.htm | 36430 | 2018-11-01 15:03:12 |
| R70.htm | 11126 | 2018-11-01 15:03:12 |
| R71.htm | 127020 | 2018-11-01 15:03:12 |
| R72.htm | 72057 | 2018-11-01 15:03:12 |
| R73.htm | 88335 | 2018-11-01 15:03:12 |
| R8.htm | 94450 | 2018-11-01 15:03:12 |
| R9.htm | 165664 | 2018-11-01 15:03:12 |
| report.css | 2767 | 2018-11-01 15:03:12 |
| Show.js | 1085 | 2018-11-01 15:03:12 |