Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000067716-19-000067-index-headers.html | 2019-10-04 17:27:59 | |
| 0000067716-19-000067-index.html | 2019-10-04 17:27:59 | |
| 0000067716-19-000067.txt | 2019-10-04 17:27:59 | |
 0000067716-19-000067-xbrl.zip | 14589 | 2019-10-04 17:27:59 |
| a2019octoberform8-k.htm | 43239 | 2019-10-04 17:27:59 |
| a2019octoberform8-k_htm.xml | 4371 | 2019-10-04 17:27:59 |
| FilingSummary.xml | 1699 | 2019-10-04 17:27:59 |
| Financial_Report.xlsx | 5818 | 2019-10-04 17:27:59 |
| mdu-20191001.xsd | 4562 | 2019-10-04 17:27:59 |
| mdu-20191001_cal.xml | 609 | 2019-10-04 17:27:59 |
| mdu-20191001_def.xml | 14527 | 2019-10-04 17:27:59 |
| mdu-20191001_lab.xml | 31381 | 2019-10-04 17:27:59 |
| mdu-20191001_pre.xml | 16430 | 2019-10-04 17:27:59 |
| MetaLinks.json | 21275 | 2019-10-04 17:27:59 |
| R1.htm | 40397 | 2019-10-04 17:27:59 |
| report.css | 2767 | 2019-10-04 17:27:59 |
| Show.js | 1084 | 2019-10-04 17:27:59 |