Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-21-000048-index-headers.html | 2021-08-16 09:47:22 | |
| 0000067716-21-000048-index.html | 2021-08-16 09:47:22 | |
| 0000067716-21-000048.txt | 2021-08-16 09:47:22 | |
 0000067716-21-000048-xbrl.zip | 13389 | 2021-08-16 09:47:22 |
| FilingSummary.xml | 1627 | 2021-08-16 09:47:22 |
| Financial_Report.xlsx | 5693 | 2021-08-16 09:47:22 |
| mdu-20210810.htm | 32264 | 2021-08-16 09:47:22 |
| mdu-20210810.xsd | 2149 | 2021-08-16 09:47:22 |
| mdu-20210810_def.xml | 14930 | 2021-08-16 09:47:22 |
| mdu-20210810_htm.xml | 11224 | 2021-08-16 09:47:22 |
| mdu-20210810_lab.xml | 29024 | 2021-08-16 09:47:22 |
| mdu-20210810_pre.xml | 15550 | 2021-08-16 09:47:22 |
| MetaLinks.json | 20078 | 2021-08-16 09:47:22 |
| R1.htm | 40395 | 2021-08-16 09:47:22 |
| report.css | 2767 | 2021-08-16 09:47:22 |
| Show.js | 1084 | 2021-08-16 09:47:22 |