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| 0000110019-15-000004-index.html | 2015-02-25 10:48:42 | |
| 0000110019-15-000004.txt | 2015-02-25 10:48:42 | |
 0000110019-15-000004-xbrl.zip | 121728 | 2015-02-25 10:48:42 |
| FilingSummary.xml | 15882 | 2015-02-25 10:48:42 |
| Financial_Report.xls | 408692 | 2015-02-25 10:48:42 |
| Financial_Report.xlsx | 86788 | 2015-02-25 10:48:42 |
| nwp-20141231.xml | 463423 | 2015-02-25 10:48:42 |
| nwp-20141231.xsd | 27619 | 2015-02-25 10:48:42 |
| nwp-20141231_cal.xml | 62226 | 2015-02-25 10:48:42 |
| nwp-20141231_def.xml | 114857 | 2015-02-25 10:48:42 |
| nwp-20141231_lab.xml | 448999 | 2015-02-25 10:48:42 |
| nwp-20141231_pre.xml | 241475 | 2015-02-25 10:48:42 |
| nwp_20141231x10k.htm | 775470 | 2015-02-25 10:48:42 |
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| report.css | 2740 | 2015-02-25 10:48:42 |
| Show.js | 1410 | 2015-02-25 10:48:42 |