Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-21-000003-index-headers.html | 2021-02-03 16:56:35 | |
| 0000067716-21-000003-index.html | 2021-02-03 16:56:35 | |
| 0000067716-21-000003.txt | 2021-02-03 16:56:35 | |
 0000067716-21-000003-xbrl.zip | 41953 | 2021-02-03 16:56:35 |
| a2020earningsreleaseex-99.htm | 587325 | 2021-02-03 16:56:35 |
| FilingSummary.xml | 1725 | 2021-02-03 16:56:35 |
| Financial_Report.xlsx | 5482 | 2021-02-03 16:56:35 |
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| mdu-20210203.xsd | 2416 | 2021-02-03 16:56:35 |
| mdu-20210203_cal.xml | 711 | 2021-02-03 16:56:35 |
| mdu-20210203_def.xml | 14946 | 2021-02-03 16:56:35 |
| mdu-20210203_htm.xml | 11211 | 2021-02-03 16:56:35 |
| mdu-20210203_lab.xml | 29024 | 2021-02-03 16:56:35 |
| mdu-20210203_pre.xml | 15562 | 2021-02-03 16:56:35 |
 mdurirpressreleasebasa171.jpg | 748436 | 2021-02-03 16:56:35 |
| MetaLinks.json | 20284 | 2021-02-03 16:56:35 |
| R1.htm | 40402 | 2021-02-03 16:56:35 |
| report.css | 2767 | 2021-02-03 16:56:35 |
| Show.js | 1085 | 2021-02-03 16:56:35 |