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|---|---|---|
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| 0000067716-11-000073-index.html | 2011-08-05 11:01:08 | |
| 0000067716-11-000073.txt | 2011-08-05 11:01:08 | |
 0000067716-11-000073-xbrl.zip | 186869 | 2011-08-05 11:01:08 |
| exhibit10a.htm | 38368 | 2011-08-05 11:01:08 |
| exhibit10b.htm | 40467 | 2011-08-05 11:01:08 |
| exhibit10c.htm | 33602 | 2011-08-05 11:01:08 |
| exhibit10d.htm | 20934 | 2011-08-05 11:01:08 |
| exhibit12.htm | 47318 | 2011-08-05 11:01:08 |
| exhibit31a.htm | 12302 | 2011-08-05 11:01:08 |
| exhibit31b.htm | 13573 | 2011-08-05 11:01:08 |
| exhibit32.htm | 7803 | 2011-08-05 11:01:08 |
| FilingSummary.xml | 22084 | 2011-08-05 11:01:08 |
| Financial_Report.xls | 1502257 | 2011-08-05 11:01:08 |
| mdu-20110630.xml | 1866443 | 2011-08-05 11:01:08 |
| mdu-20110630.xsd | 61699 | 2011-08-05 11:01:08 |
| mdu-20110630_cal.xml | 91330 | 2011-08-05 11:01:08 |
| mdu-20110630_def.xml | 553032 | 2011-08-05 11:01:08 |
| mdu-20110630_lab.xml | 695493 | 2011-08-05 11:01:08 |
| mdu-20110630_pre.xml | 329021 | 2011-08-05 11:01:08 |
| mduform10-q.htm | 2363431 | 2011-08-05 11:01:08 |
| R1.htm | 33006 | 2011-08-05 11:01:08 |
| R10.htm | 8352 | 2011-08-05 11:01:08 |
| R11.htm | 14341 | 2011-08-05 11:01:08 |
| R12.htm | 9869 | 2011-08-05 11:01:08 |
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| R14.htm | 10336 | 2011-08-05 11:01:08 |
| R15.htm | 11928 | 2011-08-05 11:01:08 |
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| R18.htm | 154085 | 2011-08-05 11:01:08 |
| R19.htm | 10150 | 2011-08-05 11:01:08 |
| R2.htm | 116309 | 2011-08-05 11:01:08 |
| R20.htm | 143772 | 2011-08-05 11:01:08 |
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| R22.htm | 12490 | 2011-08-05 11:01:08 |
| R23.htm | 42490 | 2011-08-05 11:01:08 |
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| R25.htm | 11850 | 2011-08-05 11:01:08 |
| R26.htm | 49896 | 2011-08-05 11:01:08 |
| R27.htm | 118982 | 2011-08-05 11:01:08 |
| R28.htm | 53885 | 2011-08-05 11:01:08 |
| R29.htm | 146513 | 2011-08-05 11:01:08 |
| R3.htm | 152565 | 2011-08-05 11:01:08 |
| R30.htm | 133541 | 2011-08-05 11:01:08 |
| R31.htm | 87505 | 2011-08-05 11:01:08 |
| R32.htm | 8385 | 2011-08-05 11:01:08 |
| R33.htm | 22887 | 2011-08-05 11:01:08 |
| R34.htm | 8736 | 2011-08-05 11:01:08 |
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| R36.htm | 71250 | 2011-08-05 11:01:08 |
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| R45.htm | 129842 | 2011-08-05 11:01:08 |
| R5.htm | 134663 | 2011-08-05 11:01:08 |
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| R7.htm | 7175 | 2011-08-05 11:01:08 |
| R8.htm | 7512 | 2011-08-05 11:01:08 |
| R9.htm | 27117 | 2011-08-05 11:01:08 |
| report.css | 2721 | 2011-08-05 11:01:08 |
| Show.js | 6423 | 2011-08-05 11:01:08 |