Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-20-000230-index-headers.html | 2020-10-26 16:24:41 | |
| 0000860413-20-000230-index.html | 2020-10-26 16:24:41 | |
| 0000860413-20-000230.txt | 2020-10-26 16:24:41 | |
 0000860413-20-000230-xbrl.zip | 45193 | 2020-10-26 16:24:41 |
| fibk-20200930x8kpr.htm | 849721 | 2020-10-26 16:24:41 |
| fibk-20201026.htm | 49994 | 2020-10-26 16:24:41 |
| fibk-20201026.xsd | 2411 | 2020-10-26 16:24:41 |
| fibk-20201026_cal.xml | 702 | 2020-10-26 16:24:41 |
| fibk-20201026_def.xml | 1635 | 2020-10-26 16:24:41 |
| fibk-20201026_htm.xml | 10901 | 2020-10-26 16:24:41 |
| fibk-20201026_lab.xml | 24275 | 2020-10-26 16:24:41 |
| fibk-20201026_pre.xml | 12638 | 2020-10-26 16:24:41 |
 fibslogo2linea041.jpg | 165531 | 2020-10-26 16:24:41 |
| FilingSummary.xml | 1713 | 2020-10-26 16:24:41 |
| Financial_Report.xlsx | 5455 | 2020-10-26 16:24:41 |
| MetaLinks.json | 17159 | 2020-10-26 16:24:41 |
| R1.htm | 38622 | 2020-10-26 16:24:41 |
| report.css | 2767 | 2020-10-26 16:24:41 |
| Show.js | 1085 | 2020-10-26 16:24:41 |