Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-19-326127-index-headers.html | 2019-12-30 17:42:52 | |
| 0001193125-19-326127-index.html | 2019-12-30 17:42:52 | |
| 0001193125-19-326127.txt | 2019-12-30 17:42:52 | |
 0001193125-19-326127-xbrl.zip | 63148 | 2019-12-30 17:42:52 |
 BarChart1.png | 31800 | 2019-12-30 17:42:52 |
 BarChart2.png | 27890 | 2019-12-30 17:42:52 |
| d844446d497.htm | 6051 | 2019-12-30 17:42:52 |
| FilingSummary.xml | 4640 | 2019-12-30 17:42:52 |
 g844446snap0001.jpg | 4876 | 2019-12-30 17:42:52 |
| ist-20191213.xml | 90921 | 2019-12-30 17:42:52 |
| ist-20191213.xsd | 12864 | 2019-12-30 17:42:52 |
| ist-20191213_cal.xml | 4735 | 2019-12-30 17:42:52 |
| ist-20191213_def.xml | 403497 | 2019-12-30 17:42:52 |
| ist-20191213_lab.xml | 151987 | 2019-12-30 17:42:52 |
| ist-20191213_pre.xml | 316156 | 2019-12-30 17:42:52 |
| R1.htm | 18243 | 2019-12-30 17:42:52 |
| R13.htm | 196081 | 2019-12-30 17:42:52 |
| R14.htm | 7480 | 2019-12-30 17:42:52 |
| R2.htm | 90923 | 2019-12-30 17:42:52 |
| R7.htm | 180315 | 2019-12-30 17:42:52 |
| R8.htm | 95556 | 2019-12-30 17:42:52 |
| report.css | 2767 | 2019-12-30 17:42:52 |
| Show.js | 1085 | 2019-12-30 17:42:52 |