Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000067716-23-000102-index.html | 2023-08-17 16:20:26 | |
| 0000067716-23-000102.txt | 2023-08-17 16:20:26 | |
 0000067716-23-000102-xbrl.zip | 15638 | 2023-08-17 16:20:26 |
| a2023exhibit99.htm | 8327 | 2023-08-17 16:20:26 |
| FilingSummary.xml | 1668 | 2023-08-17 16:20:26 |
| Financial_Report.xlsx | 5714 | 2023-08-17 16:20:26 |
| mdu-20230817.htm | 31103 | 2023-08-17 16:20:26 |
| mdu-20230817.xsd | 2139 | 2023-08-17 16:20:26 |
| mdu-20230817_def.xml | 14719 | 2023-08-17 16:20:26 |
| mdu-20230817_htm.xml | 2827 | 2023-08-17 16:20:26 |
| mdu-20230817_lab.xml | 28553 | 2023-08-17 16:20:26 |
| mdu-20230817_pre.xml | 15384 | 2023-08-17 16:20:26 |
| MetaLinks.json | 19866 | 2023-08-17 16:20:26 |
 pressreleasea.jpg | 85124 | 2023-08-17 16:20:26 |
| R1.htm | 39852 | 2023-08-17 16:20:26 |
| report.css | 2767 | 2023-08-17 16:20:26 |
| Show.js | 1085 | 2023-08-17 16:20:26 |