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|---|---|---|
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| 0001193125-18-084298-index.html | 2018-03-15 18:13:44 | |
| 0001193125-18-084298.txt | 2018-03-15 18:13:44 | |
 0001193125-18-084298-xbrl.zip | 38842 | 2018-03-15 18:13:44 |
 BarChart1.png | 26192 | 2018-03-15 18:13:44 |
| d544689d497.htm | 4644 | 2018-03-15 18:13:44 |
| FilingSummary.xml | 3534 | 2018-03-15 18:13:44 |
 g544689g92w55.jpg | 15016 | 2018-03-15 18:13:44 |
| ist-20180228.xml | 46444 | 2018-03-15 18:13:44 |
| ist-20180228.xsd | 8069 | 2018-03-15 18:13:44 |
| ist-20180228_cal.xml | 4739 | 2018-03-15 18:13:44 |
| ist-20180228_def.xml | 213135 | 2018-03-15 18:13:44 |
| ist-20180228_lab.xml | 137673 | 2018-03-15 18:13:44 |
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| R2.htm | 93199 | 2018-03-15 18:13:44 |
| R7.htm | 179769 | 2018-03-15 18:13:44 |
| R8.htm | 7475 | 2018-03-15 18:13:44 |
| report.css | 2767 | 2018-03-15 18:13:44 |
| Show.js | 1410 | 2018-03-15 18:13:44 |