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|---|---|---|
 0001193125-15-196713-index-headers.html | 2015-05-21 14:16:43 | |
| 0001193125-15-196713-index.html | 2015-05-21 14:16:43 | |
| 0001193125-15-196713.txt | 2015-05-21 14:16:43 | |
 0001193125-15-196713-xbrl.zip | 63368 | 2015-05-21 14:16:43 |
 BarChart1.jpg | 26296 | 2015-05-21 14:16:43 |
 BarChart2.jpg | 22337 | 2015-05-21 14:16:43 |
 BarChart3.jpg | 13956 | 2015-05-21 14:16:43 |
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| d902001d485bpos.htm | 31105 | 2015-05-21 14:16:43 |
| FilingSummary.xml | 2745 | 2015-05-21 14:16:43 |
| Financial_Report.xls | 668957 | 2015-05-21 14:16:43 |
| Financial_Report.xlsx | 227796 | 2015-05-21 14:16:43 |
| natfndstrsti-20150501.xml | 255912 | 2015-05-21 14:16:43 |
| natfndstrsti-20150501.xsd | 11648 | 2015-05-21 14:16:43 |
| natfndstrsti-20150501_def.xml | 164084 | 2015-05-21 14:16:43 |
| natfndstrsti-20150501_lab.xml | 154960 | 2015-05-21 14:16:43 |
| natfndstrsti-20150501_pre.xml | 211056 | 2015-05-21 14:16:43 |
| R1.htm | 21880 | 2015-05-21 14:16:43 |
| R2.htm | 334011 | 2015-05-21 14:16:43 |
| R9.htm | 825221 | 2015-05-21 14:16:43 |
| report.css | 2739 | 2015-05-21 14:16:43 |
| Show.js | 1410 | 2015-05-21 14:16:43 |