Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-12-204691-index-headers.html | 2012-05-02 16:29:29 | |
| 0001193125-12-204691-index.html | 2012-05-02 16:29:29 | |
| 0001193125-12-204691.txt | 2012-05-02 16:29:29 | |
 0001193125-12-204691-xbrl.zip | 42414 | 2012-05-02 16:29:29 |
| d320810d10q.htm | 338491 | 2012-05-02 16:29:29 |
| d320810dex101.htm | 170040 | 2012-05-02 16:29:29 |
| d320810dex311.htm | 7976 | 2012-05-02 16:29:29 |
| d320810dex312.htm | 8165 | 2012-05-02 16:29:29 |
| d320810dex321.htm | 4632 | 2012-05-02 16:29:29 |
| d320810dex322.htm | 4651 | 2012-05-02 16:29:29 |
| d320810dex951.htm | 40159 | 2012-05-02 16:29:29 |
| FilingSummary.xml | 13786 | 2012-05-02 16:29:29 |
| Financial_Report.xls | 198632 | 2012-05-02 16:29:29 |
| nr-20120331.xml | 202840 | 2012-05-02 16:29:29 |
| nr-20120331.xsd | 21881 | 2012-05-02 16:29:29 |
| nr-20120331_cal.xml | 48873 | 2012-05-02 16:29:29 |
| nr-20120331_def.xml | 20380 | 2012-05-02 16:29:29 |
| nr-20120331_lab.xml | 162720 | 2012-05-02 16:29:29 |
| nr-20120331_pre.xml | 110894 | 2012-05-02 16:29:29 |
| R1.htm | 26717 | 2012-05-02 16:29:29 |
| R10.htm | 26060 | 2012-05-02 16:29:29 |
| R11.htm | 13583 | 2012-05-02 16:29:29 |
| R12.htm | 7282 | 2012-05-02 16:29:29 |
| R13.htm | 8490 | 2012-05-02 16:29:29 |
| R14.htm | 24235 | 2012-05-02 16:29:29 |
| R15.htm | 5915 | 2012-05-02 16:29:29 |
| R16.htm | 23964 | 2012-05-02 16:29:29 |
| R17.htm | 17150 | 2012-05-02 16:29:29 |
| R18.htm | 12792 | 2012-05-02 16:29:29 |
| R19.htm | 20749 | 2012-05-02 16:29:29 |
| R2.htm | 116779 | 2012-05-02 16:29:29 |
| R20.htm | 52843 | 2012-05-02 16:29:29 |
| R21.htm | 5171 | 2012-05-02 16:29:29 |
| R22.htm | 13135 | 2012-05-02 16:29:29 |
| R23.htm | 52477 | 2012-05-02 16:29:29 |
| R24.htm | 29018 | 2012-05-02 16:29:29 |
| R25.htm | 16011 | 2012-05-02 16:29:29 |
| R26.htm | 5011 | 2012-05-02 16:29:29 |
| R27.htm | 28652 | 2012-05-02 16:29:29 |
| R28.htm | 13013 | 2012-05-02 16:29:29 |
| R3.htm | 14900 | 2012-05-02 16:29:29 |
| R4.htm | 49988 | 2012-05-02 16:29:29 |
| R5.htm | 21904 | 2012-05-02 16:29:29 |
| R6.htm | 112740 | 2012-05-02 16:29:29 |
| R7.htm | 14497 | 2012-05-02 16:29:29 |
| R8.htm | 26870 | 2012-05-02 16:29:29 |
| R9.htm | 6241 | 2012-05-02 16:29:29 |
| report.css | 2721 | 2012-05-02 16:29:29 |
| Show.js | 6423 | 2012-05-02 16:29:29 |