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| 0000073088-19-000141-index.html | 2019-12-13 15:07:44 | |
| 0000073088-19-000141.txt | 2019-12-13 15:07:44 | |
 0000073088-19-000141-xbrl.zip | 171945 | 2019-12-13 15:07:44 |
 a2incolora26.jpg | 77538 | 2019-12-13 15:07:44 |
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| FilingSummary.xml | 1959 | 2019-12-13 15:07:44 |
| Financial_Report.xlsx | 5774 | 2019-12-13 15:07:44 |
| form8kcolstrippsepurch.htm | 53940 | 2019-12-13 15:07:44 |
| form8kcolstrippsepurch_htm.xml | 4432 | 2019-12-13 15:07:44 |
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| nwe-20191209.xsd | 4691 | 2019-12-13 15:07:44 |
| nwe-20191209_cal.xml | 720 | 2019-12-13 15:07:44 |
| nwe-20191209_def.xml | 3828 | 2019-12-13 15:07:44 |
| nwe-20191209_lab.xml | 30576 | 2019-12-13 15:07:44 |
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| R1.htm | 38850 | 2019-12-13 15:07:44 |
| report.css | 2767 | 2019-12-13 15:07:44 |
| Show.js | 1085 | 2019-12-13 15:07:44 |