Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-12-000009-index-headers.html | 2012-02-27 19:07:15 | |
| 0000860413-12-000009-index.html | 2012-02-27 19:07:15 | |
| 0000860413-12-000009.txt | 2012-02-27 19:07:15 | |
 0000860413-12-000009-xbrl.zip | 170186 | 2012-02-27 19:07:15 |
| fibk-20111231.xml | 2030561 | 2012-02-27 19:07:15 |
| fibk-20111231.xsd | 24448 | 2012-02-27 19:07:15 |
| fibk-20111231x10k.htm | 3719777 | 2012-02-27 19:07:15 |
| fibk-20111231xex211.htm | 18453 | 2012-02-27 19:07:15 |
| fibk-20111231xex231.htm | 4184 | 2012-02-27 19:07:15 |
| fibk-20111231xex311.htm | 13544 | 2012-02-27 19:07:15 |
| fibk-20111231xex312.htm | 13649 | 2012-02-27 19:07:15 |
| fibk-20111231xex32.htm | 8398 | 2012-02-27 19:07:15 |
| fibk-20111231_cal.xml | 80409 | 2012-02-27 19:07:15 |
| fibk-20111231_def.xml | 102812 | 2012-02-27 19:07:15 |
| fibk-20111231_lab.xml | 332663 | 2012-02-27 19:07:15 |
| fibk-20111231_pre.xml | 171450 | 2012-02-27 19:07:15 |
| FilingSummary.xml | 15742 | 2012-02-27 19:07:15 |
| Financial_Report.xls | 1741769 | 2012-02-27 19:07:15 |
 performancegraph.jpg | 223477 | 2012-02-27 19:07:15 |
| R1.htm | 36226 | 2012-02-27 19:07:15 |
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| R9.htm | 174601 | 2012-02-27 19:07:15 |
| report.css | 2721 | 2012-02-27 19:07:15 |
| Show.js | 6423 | 2012-02-27 19:07:15 |