Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000073020-12-000018-index-headers.html | 2012-11-06 15:11:51 | |
| 0000073020-12-000018-index.html | 2012-11-06 15:11:51 | |
| 0000073020-12-000018.txt | 2012-11-06 15:11:51 | |
 0000073020-12-000018-xbrl.zip | 170338 | 2012-11-06 15:11:51 |
| FilingSummary.xml | 22880 | 2012-11-06 15:11:51 |
| Financial_Report.xls | 1270771 | 2012-11-06 15:11:51 |
 logoform10q.jpg | 3209 | 2012-11-06 15:11:51 |
| nwn-20120930.xml | 1507769 | 2012-11-06 15:11:51 |
| nwn-20120930.xsd | 51625 | 2012-11-06 15:11:51 |
| nwn-20120930_cal.xml | 78261 | 2012-11-06 15:11:51 |
| nwn-20120930_def.xml | 94689 | 2012-11-06 15:11:51 |
| nwn-20120930_lab.xml | 554621 | 2012-11-06 15:11:51 |
| nwn-20120930_pre.xml | 267973 | 2012-11-06 15:11:51 |
| nwn-2012x930x10q.htm | 1419250 | 2012-11-06 15:11:51 |
| nwn-2012x930x10qxexhibit12.htm | 86256 | 2012-11-06 15:11:51 |
| nwn-2012x930x10qxexhibit311.htm | 9331 | 2012-11-06 15:11:51 |
| nwn-2012x930x10qxexhibit312.htm | 9411 | 2012-11-06 15:11:51 |
| nwn-2012x930x10qxexhibit321.htm | 6615 | 2012-11-06 15:11:51 |
| R1.htm | 33912 | 2012-11-06 15:11:51 |
| R10.htm | 104560 | 2012-11-06 15:11:51 |
| R11.htm | 13027 | 2012-11-06 15:11:51 |
| R12.htm | 19987 | 2012-11-06 15:11:51 |
| R13.htm | 24142 | 2012-11-06 15:11:51 |
| R14.htm | 104304 | 2012-11-06 15:11:51 |
| R15.htm | 27416 | 2012-11-06 15:11:51 |
| R16.htm | 38245 | 2012-11-06 15:11:51 |
| R17.htm | 36536 | 2012-11-06 15:11:51 |
| R18.htm | 93116 | 2012-11-06 15:11:51 |
| R19.htm | 91101 | 2012-11-06 15:11:51 |
| R2.htm | 96373 | 2012-11-06 15:11:51 |
| R20.htm | 10702 | 2012-11-06 15:11:51 |
| R21.htm | 83583 | 2012-11-06 15:11:51 |
| R22.htm | 41393 | 2012-11-06 15:11:51 |
| R23.htm | 98781 | 2012-11-06 15:11:51 |
| R24.htm | 10006 | 2012-11-06 15:11:51 |
| R25.htm | 15574 | 2012-11-06 15:11:51 |
| R26.htm | 90113 | 2012-11-06 15:11:51 |
| R27.htm | 22066 | 2012-11-06 15:11:51 |
| R28.htm | 35120 | 2012-11-06 15:11:51 |
| R29.htm | 25980 | 2012-11-06 15:11:51 |
| R3.htm | 8504 | 2012-11-06 15:11:51 |
| R30.htm | 77006 | 2012-11-06 15:11:51 |
| R31.htm | 60354 | 2012-11-06 15:11:51 |
| R32.htm | 24906 | 2012-11-06 15:11:51 |
| R33.htm | 19293 | 2012-11-06 15:11:51 |
| R34.htm | 44015 | 2012-11-06 15:11:51 |
| R35.htm | 35065 | 2012-11-06 15:11:51 |
| R36.htm | 14527 | 2012-11-06 15:11:51 |
| R37.htm | 51647 | 2012-11-06 15:11:51 |
| R38.htm | 30913 | 2012-11-06 15:11:51 |
| R39.htm | 65700 | 2012-11-06 15:11:51 |
| R4.htm | 189238 | 2012-11-06 15:11:51 |
| R40.htm | 29003 | 2012-11-06 15:11:51 |
| R41.htm | 22837 | 2012-11-06 15:11:51 |
| R42.htm | 29531 | 2012-11-06 15:11:51 |
| R43.htm | 43290 | 2012-11-06 15:11:51 |
| R44.htm | 12273 | 2012-11-06 15:11:51 |
| R45.htm | 58625 | 2012-11-06 15:11:51 |
| R46.htm | 8193 | 2012-11-06 15:11:51 |
| R5.htm | 10187 | 2012-11-06 15:11:51 |
| R6.htm | 129062 | 2012-11-06 15:11:51 |
| R7.htm | 14794 | 2012-11-06 15:11:51 |
| R8.htm | 90376 | 2012-11-06 15:11:51 |
| R9.htm | 44238 | 2012-11-06 15:11:51 |
| report.css | 2721 | 2012-11-06 15:11:51 |
| Show.js | 6423 | 2012-11-06 15:11:51 |