Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000067716-23-000011-index.html | 2023-02-16 17:09:08 | |
| 0000067716-23-000011.txt | 2023-02-16 17:09:08 | |
 0000067716-23-000011-xbrl.zip | 16742 | 2023-02-16 17:09:08 |
| exhibit99-krcofficerannoun.htm | 13119 | 2023-02-16 17:09:08 |
| FilingSummary.xml | 1680 | 2023-02-16 17:09:08 |
| Financial_Report.xlsx | 5711 | 2023-02-16 17:09:08 |
| mdu-20230216.htm | 35241 | 2023-02-16 17:09:08 |
| mdu-20230216.xsd | 2137 | 2023-02-16 17:09:08 |
| mdu-20230216_def.xml | 14762 | 2023-02-16 17:09:08 |
| mdu-20230216_htm.xml | 11302 | 2023-02-16 17:09:08 |
| mdu-20230216_lab.xml | 28551 | 2023-02-16 17:09:08 |
| mdu-20230216_pre.xml | 15382 | 2023-02-16 17:09:08 |
| MetaLinks.json | 19964 | 2023-02-16 17:09:08 |
 pressreleasea.jpg | 85124 | 2023-02-16 17:09:08 |
| R1.htm | 39852 | 2023-02-16 17:09:08 |
| report.css | 2767 | 2023-02-16 17:09:08 |
| Show.js | 1085 | 2023-02-16 17:09:08 |