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| 0000067716-23-000109.txt | 2023-11-02 08:36:43 | |
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| FilingSummary.xml | 1649 | 2023-11-02 08:36:43 |
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| mdu-20231101.htm | 33814 | 2023-11-02 08:36:43 |
| mdu-20231101.xsd | 2139 | 2023-11-02 08:36:43 |
| mdu-20231101_def.xml | 14719 | 2023-11-02 08:36:43 |
| mdu-20231101_htm.xml | 2827 | 2023-11-02 08:36:43 |
| mdu-20231101_lab.xml | 28553 | 2023-11-02 08:36:43 |
| mdu-20231101_pre.xml | 15384 | 2023-11-02 08:36:43 |
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