Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000067716-22-000079-index.html | 2022-12-15 16:32:45 | |
| 0000067716-22-000079.txt | 2022-12-15 16:32:45 | |
 0000067716-22-000079-xbrl.zip | 17551 | 2022-12-15 16:32:45 |
| exhibit99form10.htm | 7956 | 2022-12-15 16:32:45 |
| FilingSummary.xml | 1671 | 2022-12-15 16:32:45 |
| Financial_Report.xlsx | 5713 | 2022-12-15 16:32:45 |
| mdu-20221214.htm | 40967 | 2022-12-15 16:32:45 |
| mdu-20221214.xsd | 2137 | 2022-12-15 16:32:45 |
| mdu-20221214_def.xml | 14762 | 2022-12-15 16:32:45 |
| mdu-20221214_htm.xml | 11409 | 2022-12-15 16:32:45 |
| mdu-20221214_lab.xml | 28551 | 2022-12-15 16:32:45 |
| mdu-20221214_pre.xml | 15382 | 2022-12-15 16:32:45 |
| MetaLinks.json | 19432 | 2022-12-15 16:32:45 |
 pressreleasea.jpg | 85124 | 2022-12-15 16:32:45 |
| R1.htm | 39854 | 2022-12-15 16:32:45 |
| report.css | 2767 | 2022-12-15 16:32:45 |
| Show.js | 1085 | 2022-12-15 16:32:45 |