Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000073088-17-000083-index-headers.html | 2017-04-26 17:52:58 | |
| 0000073088-17-000083-index.html | 2017-04-26 17:52:58 | |
| 0000073088-17-000083.txt | 2017-04-26 17:52:58 | |
 0000073088-17-000083-xbrl.zip | 175726 | 2017-04-26 17:52:58 |
| ex311certificationq12017.htm | 13896 | 2017-04-26 17:52:58 |
| ex312certificationq12017.htm | 13587 | 2017-04-26 17:52:58 |
| ex321certificationq12017.htm | 6913 | 2017-04-26 17:52:58 |
| ex322certificationq12017.htm | 6880 | 2017-04-26 17:52:58 |
| FilingSummary.xml | 28284 | 2017-04-26 17:52:58 |
| Financial_Report.xlsx | 70237 | 2017-04-26 17:52:58 |
 logoa06.jpg | 252371 | 2017-04-26 17:52:58 |
| nwe-20170331.xml | 1193131 | 2017-04-26 17:52:58 |
| nwe-20170331.xsd | 35193 | 2017-04-26 17:52:58 |
| nwe-20170331_cal.xml | 89336 | 2017-04-26 17:52:58 |
| nwe-20170331_def.xml | 269469 | 2017-04-26 17:52:58 |
| nwe-20170331_lab.xml | 532381 | 2017-04-26 17:52:58 |
| nwe-20170331_pre.xml | 316854 | 2017-04-26 17:52:58 |
| nwe-33117x10q.htm | 1393138 | 2017-04-26 17:52:58 |
| R1.htm | 28521 | 2017-04-26 17:52:58 |
| R10.htm | 18152 | 2017-04-26 17:52:58 |
| R11.htm | 56100 | 2017-04-26 17:52:58 |
| R12.htm | 8771 | 2017-04-26 17:52:58 |
| R13.htm | 95792 | 2017-04-26 17:52:58 |
| R14.htm | 27229 | 2017-04-26 17:52:58 |
| R15.htm | 71534 | 2017-04-26 17:52:58 |
| R16.htm | 135712 | 2017-04-26 17:52:58 |
| R17.htm | 17720 | 2017-04-26 17:52:58 |
| R18.htm | 34132 | 2017-04-26 17:52:58 |
| R19.htm | 61391 | 2017-04-26 17:52:58 |
| R2.htm | 44428 | 2017-04-26 17:52:58 |
| R20.htm | 9696 | 2017-04-26 17:52:58 |
| R21.htm | 49226 | 2017-04-26 17:52:58 |
| R22.htm | 8694 | 2017-04-26 17:52:58 |
| R23.htm | 29434 | 2017-04-26 17:52:58 |
| R24.htm | 69894 | 2017-04-26 17:52:58 |
| R25.htm | 10674 | 2017-04-26 17:52:58 |
| R26.htm | 65422 | 2017-04-26 17:52:58 |
| R27.htm | 131604 | 2017-04-26 17:52:58 |
| R28.htm | 15019 | 2017-04-26 17:52:58 |
| R29.htm | 32957 | 2017-04-26 17:52:58 |
| R3.htm | 18780 | 2017-04-26 17:52:58 |
| R30.htm | 5984 | 2017-04-26 17:52:58 |
| R31.htm | 11844 | 2017-04-26 17:52:58 |
| R32.htm | 30856 | 2017-04-26 17:52:58 |
| R33.htm | 19034 | 2017-04-26 17:52:58 |
| R34.htm | 52362 | 2017-04-26 17:52:58 |
| R35.htm | 11190 | 2017-04-26 17:52:58 |
| R36.htm | 29708 | 2017-04-26 17:52:58 |
| R37.htm | 16370 | 2017-04-26 17:52:58 |
| R38.htm | 27535 | 2017-04-26 17:52:58 |
| R39.htm | 15056 | 2017-04-26 17:52:58 |
| R4.htm | 84700 | 2017-04-26 17:52:58 |
| R40.htm | 32580 | 2017-04-26 17:52:58 |
| R41.htm | 7010 | 2017-04-26 17:52:58 |
| R42.htm | 59308 | 2017-04-26 17:52:58 |
| R43.htm | 10329 | 2017-04-26 17:52:58 |
| R44.htm | 22535 | 2017-04-26 17:52:58 |
| R45.htm | 26142 | 2017-04-26 17:52:58 |
| R46.htm | 8454 | 2017-04-26 17:52:58 |
| R5.htm | 17180 | 2017-04-26 17:52:58 |
| R6.htm | 80751 | 2017-04-26 17:52:58 |
| R7.htm | 61380 | 2017-04-26 17:52:58 |
| R8.htm | 12788 | 2017-04-26 17:52:58 |
| R9.htm | 16705 | 2017-04-26 17:52:58 |
| report.css | 2767 | 2017-04-26 17:52:58 |
| Show.js | 1410 | 2017-04-26 17:52:58 |