Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000073020-12-000009-index-headers.html | 2012-08-03 15:27:39 | |
| 0000073020-12-000009-index.html | 2012-08-03 15:27:39 | |
| 0000073020-12-000009.txt | 2012-08-03 15:27:39 | |
 0000073020-12-000009-xbrl.zip | 113720 | 2012-08-03 15:27:39 |
| ex12.htm | 69478 | 2012-08-03 15:27:39 |
| ex31-1.htm | 8912 | 2012-08-03 15:27:39 |
| ex31-2.htm | 8990 | 2012-08-03 15:27:39 |
| ex32-1.htm | 7329 | 2012-08-03 15:27:39 |
| FilingSummary.xml | 21576 | 2012-08-03 15:27:39 |
| Financial_Report.xls | 919491 | 2012-08-03 15:27:39 |
 form10q-20090.jpg | 3209 | 2012-08-03 15:27:39 |
| form10q.htm | 1309914 | 2012-08-03 15:27:39 |
| nwn-20120630.xml | 1060721 | 2012-08-03 15:27:39 |
| nwn-20120630.xsd | 48221 | 2012-08-03 15:27:39 |
| nwn-20120630_cal.xml | 81921 | 2012-08-03 15:27:39 |
| nwn-20120630_def.xml | 72030 | 2012-08-03 15:27:39 |
| nwn-20120630_lab.xml | 319116 | 2012-08-03 15:27:39 |
| nwn-20120630_pre.xml | 260586 | 2012-08-03 15:27:39 |
| R1.htm | 37288 | 2012-08-03 15:27:39 |
| R10.htm | 67615 | 2012-08-03 15:27:39 |
| R11.htm | 13400 | 2012-08-03 15:27:39 |
| R12.htm | 18685 | 2012-08-03 15:27:39 |
| R13.htm | 21415 | 2012-08-03 15:27:39 |
| R14.htm | 72316 | 2012-08-03 15:27:39 |
| R15.htm | 20901 | 2012-08-03 15:27:39 |
| R16.htm | 28625 | 2012-08-03 15:27:39 |
| R17.htm | 30726 | 2012-08-03 15:27:39 |
| R18.htm | 76475 | 2012-08-03 15:27:39 |
| R19.htm | 69756 | 2012-08-03 15:27:39 |
| R2.htm | 96354 | 2012-08-03 15:27:39 |
| R20.htm | 8627 | 2012-08-03 15:27:39 |
| R21.htm | 64322 | 2012-08-03 15:27:39 |
| R22.htm | 27335 | 2012-08-03 15:27:39 |
| R23.htm | 58784 | 2012-08-03 15:27:39 |
| R24.htm | 8817 | 2012-08-03 15:27:39 |
| R25.htm | 11464 | 2012-08-03 15:27:39 |
| R26.htm | 59026 | 2012-08-03 15:27:39 |
| R27.htm | 16365 | 2012-08-03 15:27:39 |
| R28.htm | 25381 | 2012-08-03 15:27:39 |
| R29.htm | 19605 | 2012-08-03 15:27:39 |
| R3.htm | 8498 | 2012-08-03 15:27:39 |
| R30.htm | 57639 | 2012-08-03 15:27:39 |
| R31.htm | 39299 | 2012-08-03 15:27:39 |
| R32.htm | 32144 | 2012-08-03 15:27:39 |
| R33.htm | 44034 | 2012-08-03 15:27:39 |
| R34.htm | 34992 | 2012-08-03 15:27:39 |
| R35.htm | 14570 | 2012-08-03 15:27:39 |
| R36.htm | 49344 | 2012-08-03 15:27:39 |
| R37.htm | 25933 | 2012-08-03 15:27:39 |
| R38.htm | 61058 | 2012-08-03 15:27:39 |
| R39.htm | 24651 | 2012-08-03 15:27:39 |
| R4.htm | 200180 | 2012-08-03 15:27:39 |
| R40.htm | 22633 | 2012-08-03 15:27:39 |
| R41.htm | 31778 | 2012-08-03 15:27:39 |
| R42.htm | 52574 | 2012-08-03 15:27:39 |
| R43.htm | 66458 | 2012-08-03 15:27:39 |
| R44.htm | 6719 | 2012-08-03 15:27:39 |
| R5.htm | 10184 | 2012-08-03 15:27:39 |
| R6.htm | 125366 | 2012-08-03 15:27:39 |
| R7.htm | 16863 | 2012-08-03 15:27:39 |
| R8.htm | 67731 | 2012-08-03 15:27:39 |
| R9.htm | 30766 | 2012-08-03 15:27:39 |
| report.css | 2721 | 2012-08-03 15:27:39 |
| Show.js | 6423 | 2012-08-03 15:27:39 |