Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-20-000066-index-headers.html | 2020-12-18 10:40:41 | |
| 0000067716-20-000066-index.html | 2020-12-18 10:40:41 | |
| 0000067716-20-000066.txt | 2020-12-18 10:40:41 | |
 0000067716-20-000066-xbrl.zip | 13960 | 2020-12-18 10:40:41 |
| FilingSummary.xml | 1664 | 2020-12-18 10:40:41 |
| Financial_Report.xlsx | 5470 | 2020-12-18 10:40:41 |
| mdu-20201215.htm | 33742 | 2020-12-18 10:40:41 |
| mdu-20201215.xsd | 2403 | 2020-12-18 10:40:41 |
| mdu-20201215_cal.xml | 699 | 2020-12-18 10:40:41 |
| mdu-20201215_def.xml | 14930 | 2020-12-18 10:40:41 |
| mdu-20201215_htm.xml | 11223 | 2020-12-18 10:40:41 |
| mdu-20201215_lab.xml | 28719 | 2020-12-18 10:40:41 |
| mdu-20201215_pre.xml | 15550 | 2020-12-18 10:40:41 |
| MetaLinks.json | 20120 | 2020-12-18 10:40:41 |
| R1.htm | 40395 | 2020-12-18 10:40:41 |
| report.css | 2767 | 2020-12-18 10:40:41 |
| Show.js | 1085 | 2020-12-18 10:40:41 |