Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000110019-17-000003-index-headers.html | 2017-02-22 09:29:40 | |
| 0000110019-17-000003-index.html | 2017-02-22 09:29:40 | |
| 0000110019-17-000003.txt | 2017-02-22 09:29:40 | |
 0000110019-17-000003-xbrl.zip | 127062 | 2017-02-22 09:29:40 |
| FilingSummary.xml | 18861 | 2017-02-22 09:29:40 |
| Financial_Report.xlsx | 51644 | 2017-02-22 09:29:40 |
| nwp-20161231.xml | 485621 | 2017-02-22 09:29:40 |
| nwp-20161231.xsd | 29427 | 2017-02-22 09:29:40 |
| nwp-20161231_cal.xml | 63555 | 2017-02-22 09:29:40 |
| nwp-20161231_def.xml | 124871 | 2017-02-22 09:29:40 |
| nwp-20161231_lab.xml | 464998 | 2017-02-22 09:29:40 |
| nwp-20161231_pre.xml | 251341 | 2017-02-22 09:29:40 |
| nwp_20161231x10k.htm | 799384 | 2017-02-22 09:29:40 |
| nwp_20161231xex-311.htm | 12746 | 2017-02-22 09:29:40 |
| nwp_20161231xex-312.htm | 12885 | 2017-02-22 09:29:40 |
| nwp_20161231xex-32.htm | 7720 | 2017-02-22 09:29:40 |
| R1.htm | 27764 | 2017-02-22 09:29:40 |
| R10.htm | 11069 | 2017-02-22 09:29:40 |
| R11.htm | 9826 | 2017-02-22 09:29:40 |
| R12.htm | 24175 | 2017-02-22 09:29:40 |
| R13.htm | 18099 | 2017-02-22 09:29:40 |
| R14.htm | 41955 | 2017-02-22 09:29:40 |
| R15.htm | 75779 | 2017-02-22 09:29:40 |
| R16.htm | 6988 | 2017-02-22 09:29:40 |
| R17.htm | 12640 | 2017-02-22 09:29:40 |
| R18.htm | 38139 | 2017-02-22 09:29:40 |
| R19.htm | 16648 | 2017-02-22 09:29:40 |
| R2.htm | 39711 | 2017-02-22 09:29:40 |
| R20.htm | 16984 | 2017-02-22 09:29:40 |
| R21.htm | 37035 | 2017-02-22 09:29:40 |
| R22.htm | 54405 | 2017-02-22 09:29:40 |
| R23.htm | 19968 | 2017-02-22 09:29:40 |
| R24.htm | 7200 | 2017-02-22 09:29:40 |
| R25.htm | 119875 | 2017-02-22 09:29:40 |
| R26.htm | 19077 | 2017-02-22 09:29:40 |
| R27.htm | 9520 | 2017-02-22 09:29:40 |
| R28.htm | 35760 | 2017-02-22 09:29:40 |
| R29.htm | 12136 | 2017-02-22 09:29:40 |
| R3.htm | 100315 | 2017-02-22 09:29:40 |
| R30.htm | 33240 | 2017-02-22 09:29:40 |
| R4.htm | 19345 | 2017-02-22 09:29:40 |
| R5.htm | 84648 | 2017-02-22 09:29:40 |
| R6.htm | 44238 | 2017-02-22 09:29:40 |
| R7.htm | 6470 | 2017-02-22 09:29:40 |
| R8.htm | 14366 | 2017-02-22 09:29:40 |
| R9.htm | 43172 | 2017-02-22 09:29:40 |
| report.css | 2767 | 2017-02-22 09:29:40 |
| Show.js | 1410 | 2017-02-22 09:29:40 |