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| 0000067716-25-000007-index.html | 2025-02-06 08:33:04 | |
| 0000067716-25-000007.txt | 2025-02-06 08:33:04 | |
 0000067716-25-000007-xbrl.zip | 35211 | 2025-02-06 08:33:04 |
| a2024earningsreleaseex-99.htm | 414825 | 2025-02-06 08:33:04 |
| FilingSummary.xml | 1651 | 2025-02-06 08:33:04 |
| Financial_Report.xlsx | 5716 | 2025-02-06 08:33:04 |
| mdu-20250206.htm | 33114 | 2025-02-06 08:33:04 |
| mdu-20250206.xsd | 2020 | 2025-02-06 08:33:04 |
| mdu-20250206_def.xml | 14719 | 2025-02-06 08:33:04 |
| mdu-20250206_htm.xml | 2824 | 2025-02-06 08:33:04 |
| mdu-20250206_lab.xml | 25858 | 2025-02-06 08:33:04 |
| mdu-20250206_pre.xml | 15384 | 2025-02-06 08:33:04 |
 mdurlogoa.jpg | 41111 | 2025-02-06 08:33:04 |
| MetaLinks.json | 19866 | 2025-02-06 08:33:04 |
| R1.htm | 39851 | 2025-02-06 08:33:04 |
| report.css | 2767 | 2025-02-06 08:33:04 |
| Show.js | 1085 | 2025-02-06 08:33:04 |