Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-23-000069-index-headers.html | 2023-05-11 16:36:08 | |
| 0000067716-23-000069-index.html | 2023-05-11 16:36:08 | |
| 0000067716-23-000069.txt | 2023-05-11 16:36:08 | |
 0000067716-23-000069-xbrl.zip | 16043 | 2023-05-11 16:36:08 |
| FilingSummary.xml | 1632 | 2023-05-11 16:36:08 |
| Financial_Report.xlsx | 5715 | 2023-05-11 16:36:08 |
| mdu-20230509.htm | 65491 | 2023-05-11 16:36:08 |
| mdu-20230509.xsd | 2137 | 2023-05-11 16:36:08 |
| mdu-20230509_def.xml | 14762 | 2023-05-11 16:36:08 |
| mdu-20230509_htm.xml | 11290 | 2023-05-11 16:36:08 |
| mdu-20230509_lab.xml | 28856 | 2023-05-11 16:36:08 |
| mdu-20230509_pre.xml | 15382 | 2023-05-11 16:36:08 |
| MetaLinks.json | 20006 | 2023-05-11 16:36:08 |
| R1.htm | 39851 | 2023-05-11 16:36:08 |
| report.css | 2767 | 2023-05-11 16:36:08 |
| Show.js | 1084 | 2023-05-11 16:36:08 |