Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000102729-21-000012-index-headers.html | 2021-02-24 17:04:18 | |
| 0000102729-21-000012-index.html | 2021-02-24 17:04:18 | |
| 0000102729-21-000012.txt | 2021-02-24 17:04:18 | |
 0000102729-21-000012-xbrl.zip | 742767 | 2021-02-24 17:04:18 |
| FilingSummary.xml | 58879 | 2021-02-24 17:04:18 |
| Financial_Report.xlsx | 167728 | 2021-02-24 17:04:18 |
| MetaLinks.json | 1128196 | 2021-02-24 17:04:18 |
| R1.htm | 63132 | 2021-02-24 17:04:18 |
| R10.htm | 99970 | 2021-02-24 17:04:18 |
| R11.htm | 15898 | 2021-02-24 17:04:18 |
| R12.htm | 9780 | 2021-02-24 17:04:18 |
| R13.htm | 47668 | 2021-02-24 17:04:18 |
| R14.htm | 10859 | 2021-02-24 17:04:18 |
| R15.htm | 11299 | 2021-02-24 17:04:18 |
| R16.htm | 15126 | 2021-02-24 17:04:18 |
| R17.htm | 90700 | 2021-02-24 17:04:18 |
| R18.htm | 5294 | 2021-02-24 17:04:18 |
| R19.htm | 94838 | 2021-02-24 17:04:18 |
| R2.htm | 91348 | 2021-02-24 17:04:18 |
| R20.htm | 24805 | 2021-02-24 17:04:18 |
| R21.htm | 83341 | 2021-02-24 17:04:18 |
| R22.htm | 27885 | 2021-02-24 17:04:18 |
| R23.htm | 6890 | 2021-02-24 17:04:18 |
| R24.htm | 29382 | 2021-02-24 17:04:18 |
| R25.htm | 42964 | 2021-02-24 17:04:18 |
| R26.htm | 13233 | 2021-02-24 17:04:18 |
| R27.htm | 5622 | 2021-02-24 17:04:18 |
| R28.htm | 119031 | 2021-02-24 17:04:18 |
| R29.htm | 33707 | 2021-02-24 17:04:18 |
| R3.htm | 64017 | 2021-02-24 17:04:18 |
| R30.htm | 144751 | 2021-02-24 17:04:18 |
| R31.htm | 58953 | 2021-02-24 17:04:18 |
| R32.htm | 30196 | 2021-02-24 17:04:18 |
| R33.htm | 86239 | 2021-02-24 17:04:18 |
| R34.htm | 65963 | 2021-02-24 17:04:18 |
| R35.htm | 9902 | 2021-02-24 17:04:18 |
| R36.htm | 11443 | 2021-02-24 17:04:18 |
| R37.htm | 49694 | 2021-02-24 17:04:18 |
| R38.htm | 9472 | 2021-02-24 17:04:18 |
| R39.htm | 12083 | 2021-02-24 17:04:18 |
| R4.htm | 8134 | 2021-02-24 17:04:18 |
| R40.htm | 14689 | 2021-02-24 17:04:18 |
| R41.htm | 92756 | 2021-02-24 17:04:18 |
| R42.htm | 98297 | 2021-02-24 17:04:18 |
| R43.htm | 26521 | 2021-02-24 17:04:18 |
| R44.htm | 84440 | 2021-02-24 17:04:18 |
| R45.htm | 25194 | 2021-02-24 17:04:18 |
| R46.htm | 23622 | 2021-02-24 17:04:18 |
| R47.htm | 41056 | 2021-02-24 17:04:18 |
| R48.htm | 12868 | 2021-02-24 17:04:18 |
| R49.htm | 113055 | 2021-02-24 17:04:18 |
| R5.htm | 118408 | 2021-02-24 17:04:18 |
| R50.htm | 32940 | 2021-02-24 17:04:18 |
| R51.htm | 139015 | 2021-02-24 17:04:18 |
| R52.htm | 58991 | 2021-02-24 17:04:18 |
| R53.htm | 33066 | 2021-02-24 17:04:18 |
| R54.htm | 66127 | 2021-02-24 17:04:18 |
| R55.htm | 22163 | 2021-02-24 17:04:18 |
| R56.htm | 7412 | 2021-02-24 17:04:18 |
| R57.htm | 26524 | 2021-02-24 17:04:18 |
| R58.htm | 85216 | 2021-02-24 17:04:18 |
| R59.htm | 11869 | 2021-02-24 17:04:18 |
| R6.htm | 19604 | 2021-02-24 17:04:18 |
| R60.htm | 93651 | 2021-02-24 17:04:18 |
| R61.htm | 9678 | 2021-02-24 17:04:18 |
| R62.htm | 16338 | 2021-02-24 17:04:18 |
| R63.htm | 15142 | 2021-02-24 17:04:18 |
| R64.htm | 90791 | 2021-02-24 17:04:18 |
| R65.htm | 15907 | 2021-02-24 17:04:18 |
| R66.htm | 12963 | 2021-02-24 17:04:18 |
| R67.htm | 12227 | 2021-02-24 17:04:18 |
| R68.htm | 17536 | 2021-02-24 17:04:18 |
| R69.htm | 35700 | 2021-02-24 17:04:18 |
| R7.htm | 115279 | 2021-02-24 17:04:18 |
| R70.htm | 22850 | 2021-02-24 17:04:18 |
| R71.htm | 40627 | 2021-02-24 17:04:18 |
| R72.htm | 13990 | 2021-02-24 17:04:18 |
| R73.htm | 13117 | 2021-02-24 17:04:18 |
| R74.htm | 138237 | 2021-02-24 17:04:18 |
| R75.htm | 92708 | 2021-02-24 17:04:18 |
| R76.htm | 92845 | 2021-02-24 17:04:18 |
| R77.htm | 37313 | 2021-02-24 17:04:18 |
| R78.htm | 20310 | 2021-02-24 17:04:18 |
| R79.htm | 20587 | 2021-02-24 17:04:18 |
| R8.htm | 98065 | 2021-02-24 17:04:18 |
| R80.htm | 42255 | 2021-02-24 17:04:18 |
| R81.htm | 44083 | 2021-02-24 17:04:18 |
| R82.htm | 12142 | 2021-02-24 17:04:18 |
| R83.htm | 30997 | 2021-02-24 17:04:18 |
| R84.htm | 12176 | 2021-02-24 17:04:18 |
| R85.htm | 21240 | 2021-02-24 17:04:18 |
| R86.htm | 35450 | 2021-02-24 17:04:18 |
| R87.htm | 17351 | 2021-02-24 17:04:18 |
| R88.htm | 11852 | 2021-02-24 17:04:18 |
| R89.htm | 118502 | 2021-02-24 17:04:18 |
| R9.htm | 15142 | 2021-02-24 17:04:18 |
| R90.htm | 36395 | 2021-02-24 17:04:18 |
| R91.htm | 25643 | 2021-02-24 17:04:18 |
| R92.htm | 18021 | 2021-02-24 17:04:18 |
| R93.htm | 22272 | 2021-02-24 17:04:18 |
| R94.htm | 20991 | 2021-02-24 17:04:18 |
| R95.htm | 135801 | 2021-02-24 17:04:18 |
| R96.htm | 32408 | 2021-02-24 17:04:18 |
| R97.htm | 47964 | 2021-02-24 17:04:18 |
| R98.htm | 15293 | 2021-02-24 17:04:18 |
| report.css | 2768 | 2021-02-24 17:04:18 |
| Show.js | 1086 | 2021-02-24 17:04:18 |
| vmi-20201226.htm | 3661583 | 2021-02-24 17:04:18 |
| vmi-20201226.xsd | 83246 | 2021-02-24 17:04:18 |
| vmi-20201226_cal.xml | 156774 | 2021-02-24 17:04:18 |
| vmi-20201226_def.xml | 524316 | 2021-02-24 17:04:18 |
 vmi-20201226_g1.jpg | 121697 | 2021-02-24 17:04:18 |
 vmi-20201226_g2.jpg | 119406 | 2021-02-24 17:04:18 |
| vmi-20201226_htm.xml | 3350253 | 2021-02-24 17:04:18 |
| vmi-20201226_lab.xml | 1221019 | 2021-02-24 17:04:18 |
| vmi-20201226_pre.xml | 808378 | 2021-02-24 17:04:18 |
| vmi-ex21_2020.htm | 28045 | 2021-02-24 17:04:18 |
| vmi-ex23_2020.htm | 2556 | 2021-02-24 17:04:18 |
| vmi-ex24_2020.htm | 10129 | 2021-02-24 17:04:18 |
| vmi-ex311_2020x10k.htm | 8283 | 2021-02-24 17:04:18 |
| vmi-ex312_2020x10k.htm | 8507 | 2021-02-24 17:04:18 |
| vmi-ex321_2020x10k.htm | 8537 | 2021-02-24 17:04:18 |