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|---|---|---|
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| 0000073088-18-000102-index.html | 2018-04-24 18:28:05 | |
| 0000073088-18-000102.txt | 2018-04-24 18:28:05 | |
 0000073088-18-000102-xbrl.zip | 175825 | 2018-04-24 18:28:05 |
| ex311certificationq12018.htm | 13883 | 2018-04-24 18:28:05 |
| ex312certificationq12018.htm | 13574 | 2018-04-24 18:28:05 |
| ex321certificationq12018.htm | 6925 | 2018-04-24 18:28:05 |
| ex322certificationq12018.htm | 6893 | 2018-04-24 18:28:05 |
| FilingSummary.xml | 26764 | 2018-04-24 18:28:05 |
| Financial_Report.xlsx | 65416 | 2018-04-24 18:28:05 |
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| nwe-20180331.xml | 1491128 | 2018-04-24 18:28:05 |
| nwe-20180331.xsd | 34820 | 2018-04-24 18:28:05 |
| nwe-20180331_cal.xml | 89828 | 2018-04-24 18:28:05 |
| nwe-20180331_def.xml | 256257 | 2018-04-24 18:28:05 |
| nwe-20180331_lab.xml | 486614 | 2018-04-24 18:28:05 |
| nwe-20180331_pre.xml | 301152 | 2018-04-24 18:28:05 |
| nwe-33118x10q.htm | 1453767 | 2018-04-24 18:28:05 |
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| R9.htm | 97610 | 2018-04-24 18:28:05 |
| report.css | 2767 | 2018-04-24 18:28:05 |
| Show.js | 1410 | 2018-04-24 18:28:05 |