Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-23-000013-index-headers.html | 2023-02-17 08:45:13 | |
| 0000067716-23-000013-index.html | 2023-02-17 08:45:13 | |
| 0000067716-23-000013.txt | 2023-02-17 08:45:13 | |
 0000067716-23-000013-xbrl.zip | 14304 | 2023-02-17 08:45:13 |
| FilingSummary.xml | 1632 | 2023-02-17 08:45:13 |
| Financial_Report.xlsx | 5713 | 2023-02-17 08:45:13 |
| mdu-20230216.htm | 36724 | 2023-02-17 08:45:13 |
| mdu-20230216.xsd | 2137 | 2023-02-17 08:45:13 |
| mdu-20230216_def.xml | 14762 | 2023-02-17 08:45:13 |
| mdu-20230216_htm.xml | 11290 | 2023-02-17 08:45:13 |
| mdu-20230216_lab.xml | 28551 | 2023-02-17 08:45:13 |
| mdu-20230216_pre.xml | 15382 | 2023-02-17 08:45:13 |
| MetaLinks.json | 19964 | 2023-02-17 08:45:13 |
| R1.htm | 39852 | 2023-02-17 08:45:13 |
| report.css | 2767 | 2023-02-17 08:45:13 |
| Show.js | 1084 | 2023-02-17 08:45:13 |