Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-20-000003-index-headers.html | 2020-01-06 19:20:20 | |
| 0000860413-20-000003-index.html | 2020-01-06 19:20:20 | |
| 0000860413-20-000003.txt | 2020-01-06 19:20:20 | |
 0000860413-20-000003-xbrl.zip | 16130 | 2020-01-06 19:20:20 |
| ex991-pressrelease2020.htm | 13232 | 2020-01-06 19:20:20 |
| fibk-20200106.xsd | 4557 | 2020-01-06 19:20:20 |
| fibk-20200106_cal.xml | 600 | 2020-01-06 19:20:20 |
| fibk-20200106_def.xml | 1450 | 2020-01-06 19:20:20 |
| fibk-20200106_lab.xml | 26142 | 2020-01-06 19:20:20 |
| fibk-20200106_pre.xml | 13556 | 2020-01-06 19:20:20 |
| fibk-8kx20200106execre.htm | 50421 | 2020-01-06 19:20:20 |
| fibk-8kx20200106execre_htm.xml | 4229 | 2020-01-06 19:20:20 |
 fibslogo2line.jpg | 165531 | 2020-01-06 19:20:20 |
| FilingSummary.xml | 1749 | 2020-01-06 19:20:20 |
| Financial_Report.xlsx | 5792 | 2020-01-06 19:20:20 |
| MetaLinks.json | 18186 | 2020-01-06 19:20:20 |
| R1.htm | 38617 | 2020-01-06 19:20:20 |
| report.css | 2767 | 2020-01-06 19:20:20 |
| Show.js | 1085 | 2020-01-06 19:20:20 |