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|---|---|---|
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| 0000067716-11-000021-index.html | 2011-02-23 09:47:25 | |
| 0000067716-11-000021.txt | 2011-02-23 09:47:25 | |
 0000067716-11-000021-xbrl.zip | 150312 | 2011-02-23 09:47:25 |
| defnref.xml | 33659 | 2011-02-23 09:47:25 |
| exhibit10ae.htm | 22579 | 2011-02-23 09:47:25 |
| exhibit10n.htm | 17224 | 2011-02-23 09:47:25 |
| exhibit12.htm | 105799 | 2011-02-23 09:47:25 |
| exhibit21.htm | 55070 | 2011-02-23 09:47:25 |
| exhibit23a.htm | 4021 | 2011-02-23 09:47:25 |
| exhibit23b.htm | 4956 | 2011-02-23 09:47:25 |
| exhibit31a.htm | 12150 | 2011-02-23 09:47:25 |
| exhibit31b.htm | 13568 | 2011-02-23 09:47:25 |
| exhibit32.htm | 7723 | 2011-02-23 09:47:25 |
| exhibit3b.htm | 171511 | 2011-02-23 09:47:25 |
| exhibit99b.htm | 161808 | 2011-02-23 09:47:25 |
| FilingSummary.xml | 17940 | 2011-02-23 09:47:25 |
| Financial_Report.xls | 2213448 | 2011-02-23 09:47:25 |
| mdu-20101231.xml | 2557976 | 2011-02-23 09:47:25 |
| mdu-20101231.xsd | 20837 | 2011-02-23 09:47:25 |
| mdu-20101231_cal.xml | 61956 | 2011-02-23 09:47:25 |
| mdu-20101231_def.xml | 15337 | 2011-02-23 09:47:25 |
| mdu-20101231_lab.xml | 241626 | 2011-02-23 09:47:25 |
| mdu-20101231_pre.xml | 135451 | 2011-02-23 09:47:25 |
| mduform10-k2010.htm | 5116724 | 2011-02-23 09:47:25 |
| R1.xml | 120791 | 2011-02-23 09:47:25 |
| R10.xml | 87892 | 2011-02-23 09:47:25 |
| R11.xml | 67807 | 2011-02-23 09:47:25 |
| R12.xml | 59688 | 2011-02-23 09:47:25 |
| R13.xml | 116978 | 2011-02-23 09:47:25 |
| R14.xml | 87867 | 2011-02-23 09:47:25 |
| R15.xml | 28572 | 2011-02-23 09:47:25 |
| R16.xml | 31301 | 2011-02-23 09:47:25 |
| R17.xml | 9975 | 2011-02-23 09:47:25 |
| R18.xml | 73360 | 2011-02-23 09:47:25 |
| R19.xml | 194441 | 2011-02-23 09:47:25 |
| R2.xml | 124281 | 2011-02-23 09:47:25 |
| R20.xml | 283074 | 2011-02-23 09:47:25 |
| R21.xml | 497553 | 2011-02-23 09:47:25 |
| R22.xml | 38545 | 2011-02-23 09:47:25 |
| R23.xml | 10492 | 2011-02-23 09:47:25 |
| R24.xml | 38780 | 2011-02-23 09:47:25 |
| R25.xml | 392477 | 2011-02-23 09:47:25 |
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| R27.xml | 36074 | 2011-02-23 09:47:25 |
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| R29.xml | 37985 | 2011-02-23 09:47:25 |
| R3.xml | 16242 | 2011-02-23 09:47:25 |
| R4.xml | 203448 | 2011-02-23 09:47:25 |
| R5.xml | 146972 | 2011-02-23 09:47:25 |
| R6.xml | 251381 | 2011-02-23 09:47:25 |
| R7.xml | 10997 | 2011-02-23 09:47:25 |
| R8.xml | 8461 | 2011-02-23 09:47:25 |
| R9.xml | 11246 | 2011-02-23 09:47:25 |