Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-24-000054-index-headers.html | 2024-05-02 08:32:29 | |
| 0000067716-24-000054-index.html | 2024-05-02 08:32:29 | |
| 0000067716-24-000054.txt | 2024-05-02 08:32:29 | |
 0000067716-24-000054-xbrl.zip | 34679 | 2024-05-02 08:32:29 |
| a2024q1ex99.htm | 404574 | 2024-05-02 08:32:29 |
 enrheader-100years.jpg | 84230 | 2024-05-02 08:32:29 |
| FilingSummary.xml | 1666 | 2024-05-02 08:32:29 |
| Financial_Report.xlsx | 5724 | 2024-05-02 08:32:29 |
| mdu-20240502.htm | 24082 | 2024-05-02 08:32:29 |
| mdu-20240502.xsd | 2152 | 2024-05-02 08:32:29 |
| mdu-20240502_def.xml | 14731 | 2024-05-02 08:32:29 |
| mdu-20240502_htm.xml | 2827 | 2024-05-02 08:32:29 |
| mdu-20240502_lab.xml | 26114 | 2024-05-02 08:32:29 |
| mdu-20240502_pre.xml | 15396 | 2024-05-02 08:32:29 |
| MetaLinks.json | 20030 | 2024-05-02 08:32:29 |
| R1.htm | 39859 | 2024-05-02 08:32:29 |
| report.css | 2767 | 2024-05-02 08:32:29 |
| Show.js | 1085 | 2024-05-02 08:32:29 |