Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-21-000010-index-headers.html | 2021-03-12 14:33:20 | |
| 0000067716-21-000010-index.html | 2021-03-12 14:33:20 | |
| 0000067716-21-000010.txt | 2021-03-12 14:33:20 | |
 0000067716-21-000010-xbrl.zip | 14042 | 2021-03-12 14:33:20 |
| FilingSummary.xml | 1664 | 2021-03-12 14:33:20 |
| Financial_Report.xlsx | 5474 | 2021-03-12 14:33:20 |
| mdu-20210309.htm | 35271 | 2021-03-12 14:33:20 |
| mdu-20210309.xsd | 2403 | 2021-03-12 14:33:20 |
| mdu-20210309_cal.xml | 699 | 2021-03-12 14:33:20 |
| mdu-20210309_def.xml | 14930 | 2021-03-12 14:33:20 |
| mdu-20210309_htm.xml | 11416 | 2021-03-12 14:33:20 |
| mdu-20210309_lab.xml | 28719 | 2021-03-12 14:33:20 |
| mdu-20210309_pre.xml | 15550 | 2021-03-12 14:33:20 |
| MetaLinks.json | 20120 | 2021-03-12 14:33:20 |
| R1.htm | 40396 | 2021-03-12 14:33:20 |
| report.css | 2767 | 2021-03-12 14:33:20 |
| Show.js | 1085 | 2021-03-12 14:33:20 |