Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001031203-20-000006-index-headers.html | 2020-02-13 16:46:22 | |
| 0001031203-20-000006-index.html | 2020-02-13 16:46:22 | |
| 0001031203-20-000006.txt | 2020-02-13 16:46:22 | |
 0001031203-20-000006-xbrl.zip | 907360 | 2020-02-13 16:46:22 |
| a2019exhibit211-subsid.htm | 141322 | 2020-02-13 16:46:22 |
| a2019exhibit231.htm | 5463 | 2020-02-13 16:46:22 |
| a2019exhibit311.htm | 12284 | 2020-02-13 16:46:22 |
| a2019exhibit312.htm | 12402 | 2020-02-13 16:46:22 |
| a2019exhibit321.htm | 6280 | 2020-02-13 16:46:22 |
| a2019exhibit322.htm | 6235 | 2020-02-13 16:46:22 |
| a2019exhibit408.htm | 32045 | 2020-02-13 16:46:22 |
| a2019form10-k.htm | 6615696 | 2020-02-13 16:46:22 |
| a2019form10-k_htm.xml | 4885224 | 2020-02-13 16:46:22 |
| FilingSummary.xml | 71427 | 2020-02-13 16:46:22 |
| Financial_Report.xlsx | 157994 | 2020-02-13 16:46:22 |
| gpi-20191231.xsd | 93450 | 2020-02-13 16:46:22 |
| gpi-20191231_cal.xml | 162545 | 2020-02-13 16:46:22 |
| gpi-20191231_def.xml | 398149 | 2020-02-13 16:46:22 |
| gpi-20191231_lab.xml | 1094812 | 2020-02-13 16:46:22 |
| gpi-20191231_pre.xml | 698048 | 2020-02-13 16:46:22 |
| MetaLinks.json | 915589 | 2020-02-13 16:46:22 |
 nvsalesbymanu3da07.jpg | 143546 | 2020-02-13 16:46:22 |
 nvsalesbystatea04.jpg | 93013 | 2020-02-13 16:46:22 |
 performancegraph2019a05.jpg | 87970 | 2020-02-13 16:46:22 |
| R1.htm | 60583 | 2020-02-13 16:46:22 |
| R10.htm | 62896 | 2020-02-13 16:46:22 |
| R100.htm | 8740 | 2020-02-13 16:46:22 |
| R101.htm | 6203 | 2020-02-13 16:46:22 |
| R102.htm | 60763 | 2020-02-13 16:46:22 |
| R103.htm | 12456 | 2020-02-13 16:46:22 |
| R104.htm | 9884 | 2020-02-13 16:46:22 |
| R105.htm | 4110 | 2020-02-13 16:46:22 |
| R106.htm | 77901 | 2020-02-13 16:46:22 |
| R107.htm | 18212 | 2020-02-13 16:46:22 |
| R108.htm | 132415 | 2020-02-13 16:46:22 |
| R109.htm | 5642 | 2020-02-13 16:46:22 |
| R11.htm | 104447 | 2020-02-13 16:46:22 |
| R110.htm | 102420 | 2020-02-13 16:46:22 |
| R111.htm | 102256 | 2020-02-13 16:46:22 |
| R112.htm | 34231 | 2020-02-13 16:46:22 |
| R12.htm | 16779 | 2020-02-13 16:46:22 |
| R13.htm | 32684 | 2020-02-13 16:46:22 |
| R14.htm | 42341 | 2020-02-13 16:46:22 |
| R15.htm | 74031 | 2020-02-13 16:46:22 |
| R16.htm | 20505 | 2020-02-13 16:46:22 |
| R17.htm | 19706 | 2020-02-13 16:46:22 |
| R18.htm | 27538 | 2020-02-13 16:46:22 |
| R19.htm | 148368 | 2020-02-13 16:46:22 |
| R2.htm | 82733 | 2020-02-13 16:46:22 |
| R20.htm | 55288 | 2020-02-13 16:46:22 |
| R21.htm | 39454 | 2020-02-13 16:46:22 |
| R22.htm | 54785 | 2020-02-13 16:46:22 |
| R23.htm | 145141 | 2020-02-13 16:46:22 |
| R24.htm | 7921 | 2020-02-13 16:46:22 |
| R25.htm | 8163 | 2020-02-13 16:46:22 |
| R26.htm | 92171 | 2020-02-13 16:46:22 |
| R27.htm | 17650 | 2020-02-13 16:46:22 |
| R28.htm | 156336 | 2020-02-13 16:46:22 |
| R29.htm | 660060 | 2020-02-13 16:46:22 |
| R3.htm | 26519 | 2020-02-13 16:46:22 |
| R30.htm | 70270 | 2020-02-13 16:46:22 |
| R31.htm | 101125 | 2020-02-13 16:46:22 |
| R32.htm | 37786 | 2020-02-13 16:46:22 |
| R33.htm | 95452 | 2020-02-13 16:46:22 |
| R34.htm | 16001 | 2020-02-13 16:46:22 |
| R35.htm | 41734 | 2020-02-13 16:46:22 |
| R36.htm | 65800 | 2020-02-13 16:46:22 |
| R37.htm | 19634 | 2020-02-13 16:46:22 |
| R38.htm | 20281 | 2020-02-13 16:46:22 |
| R39.htm | 30493 | 2020-02-13 16:46:22 |
| R4.htm | 54218 | 2020-02-13 16:46:22 |
| R40.htm | 98413 | 2020-02-13 16:46:22 |
| R41.htm | 49762 | 2020-02-13 16:46:22 |
| R42.htm | 27566 | 2020-02-13 16:46:22 |
| R43.htm | 56250 | 2020-02-13 16:46:22 |
| R44.htm | 143205 | 2020-02-13 16:46:22 |
| R45.htm | 91876 | 2020-02-13 16:46:22 |
| R46.htm | 24360 | 2020-02-13 16:46:22 |
| R47.htm | 172050 | 2020-02-13 16:46:22 |
| R48.htm | 660333 | 2020-02-13 16:46:22 |
| R49.htm | 70141 | 2020-02-13 16:46:22 |
| R5.htm | 34654 | 2020-02-13 16:46:22 |
| R50.htm | 14233 | 2020-02-13 16:46:22 |
| R51.htm | 5312 | 2020-02-13 16:46:22 |
| R52.htm | 22195 | 2020-02-13 16:46:22 |
| R53.htm | 3958 | 2020-02-13 16:46:22 |
| R54.htm | 5004 | 2020-02-13 16:46:22 |
| R55.htm | 5303 | 2020-02-13 16:46:22 |
| R56.htm | 6488 | 2020-02-13 16:46:22 |
| R57.htm | 18942 | 2020-02-13 16:46:22 |
| R58.htm | 4023 | 2020-02-13 16:46:22 |
| R59.htm | 4229 | 2020-02-13 16:46:22 |
| R6.htm | 14197 | 2020-02-13 16:46:22 |
| R60.htm | 21970 | 2020-02-13 16:46:22 |
| R61.htm | 12362 | 2020-02-13 16:46:22 |
| R62.htm | 77437 | 2020-02-13 16:46:22 |
| R63.htm | 9884 | 2020-02-13 16:46:22 |
| R64.htm | 39439 | 2020-02-13 16:46:22 |
| R65.htm | 64940 | 2020-02-13 16:46:22 |
| R66.htm | 23782 | 2020-02-13 16:46:22 |
| R67.htm | 39795 | 2020-02-13 16:46:22 |
| R68.htm | 17266 | 2020-02-13 16:46:22 |
| R69.htm | 25480 | 2020-02-13 16:46:22 |
| R7.htm | 41692 | 2020-02-13 16:46:22 |
| R70.htm | 18217 | 2020-02-13 16:46:22 |
| R71.htm | 18646 | 2020-02-13 16:46:22 |
| R72.htm | 24019 | 2020-02-13 16:46:22 |
| R73.htm | 10689 | 2020-02-13 16:46:22 |
| R74.htm | 9038 | 2020-02-13 16:46:22 |
| R75.htm | 25028 | 2020-02-13 16:46:22 |
| R76.htm | 13536 | 2020-02-13 16:46:22 |
| R77.htm | 4204 | 2020-02-13 16:46:22 |
| R78.htm | 19801 | 2020-02-13 16:46:22 |
| R79.htm | 19154 | 2020-02-13 16:46:22 |
| R8.htm | 4660 | 2020-02-13 16:46:22 |
| R80.htm | 38483 | 2020-02-13 16:46:22 |
| R81.htm | 11392 | 2020-02-13 16:46:22 |
| R82.htm | 18934 | 2020-02-13 16:46:22 |
| R83.htm | 16767 | 2020-02-13 16:46:22 |
| R84.htm | 10980 | 2020-02-13 16:46:22 |
| R85.htm | 24681 | 2020-02-13 16:46:22 |
| R86.htm | 23132 | 2020-02-13 16:46:22 |
| R87.htm | 68207 | 2020-02-13 16:46:22 |
| R88.htm | 38459 | 2020-02-13 16:46:22 |
| R89.htm | 19183 | 2020-02-13 16:46:22 |
| R9.htm | 97293 | 2020-02-13 16:46:22 |
| R90.htm | 19420 | 2020-02-13 16:46:22 |
| R91.htm | 9370 | 2020-02-13 16:46:22 |
| R92.htm | 15332 | 2020-02-13 16:46:22 |
| R93.htm | 9224 | 2020-02-13 16:46:22 |
| R94.htm | 23577 | 2020-02-13 16:46:22 |
| R95.htm | 29631 | 2020-02-13 16:46:22 |
| R96.htm | 29668 | 2020-02-13 16:46:22 |
| R97.htm | 42291 | 2020-02-13 16:46:22 |
| R98.htm | 16224 | 2020-02-13 16:46:22 |
| R99.htm | 8864 | 2020-02-13 16:46:22 |
| R9999.htm | 6157 | 2020-02-13 16:46:22 |
| report.css | 2767 | 2020-02-13 16:46:22 |
 revandgpbysegmentv2.jpg | 172529 | 2020-02-13 16:46:22 |
| Show.js | 1085 | 2020-02-13 16:46:22 |