Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-23-000099-index-headers.html | 2023-08-10 16:39:15 | |
| 0000067716-23-000099-index.html | 2023-08-10 16:39:15 | |
| 0000067716-23-000099.txt | 2023-08-10 16:39:15 | |
 0000067716-23-000099-xbrl.zip | 12147 | 2023-08-10 16:39:15 |
| FilingSummary.xml | 1632 | 2023-08-10 16:39:15 |
| Financial_Report.xlsx | 5714 | 2023-08-10 16:39:15 |
| mdu-20230810.htm | 25915 | 2023-08-10 16:39:15 |
| mdu-20230810.xsd | 2139 | 2023-08-10 16:39:15 |
| mdu-20230810_def.xml | 14719 | 2023-08-10 16:39:15 |
| mdu-20230810_htm.xml | 2827 | 2023-08-10 16:39:15 |
| mdu-20230810_lab.xml | 28553 | 2023-08-10 16:39:15 |
| mdu-20230810_pre.xml | 15384 | 2023-08-10 16:39:15 |
| MetaLinks.json | 19866 | 2023-08-10 16:39:15 |
| R1.htm | 39852 | 2023-08-10 16:39:15 |
| report.css | 2767 | 2023-08-10 16:39:15 |
| Show.js | 1084 | 2023-08-10 16:39:15 |