Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-20-000107-index-headers.html | 2020-04-15 10:11:21 | |
| 0000860413-20-000107-index.html | 2020-04-15 10:11:21 | |
| 0000860413-20-000107.txt | 2020-04-15 10:11:21 | |
 0000860413-20-000107-xbrl.zip | 15669 | 2020-04-15 10:11:21 |
| ex991-pressrelease2020.htm | 10360 | 2020-04-15 10:11:21 |
| fibk-20200415.xsd | 4419 | 2020-04-15 10:11:21 |
| fibk-20200415_cal.xml | 600 | 2020-04-15 10:11:21 |
| fibk-20200415_def.xml | 1450 | 2020-04-15 10:11:21 |
| fibk-20200415_lab.xml | 26142 | 2020-04-15 10:11:21 |
| fibk-20200415_pre.xml | 13556 | 2020-04-15 10:11:21 |
| fibk-8kx20200415annual.htm | 50734 | 2020-04-15 10:11:21 |
| fibk-8kx20200415annual_htm.xml | 4343 | 2020-04-15 10:11:21 |
 fibslogo2linea01.jpg | 165531 | 2020-04-15 10:11:21 |
| FilingSummary.xml | 1744 | 2020-04-15 10:11:21 |
| Financial_Report.xlsx | 5790 | 2020-04-15 10:11:21 |
| MetaLinks.json | 18133 | 2020-04-15 10:11:21 |
| R1.htm | 38612 | 2020-04-15 10:11:21 |
| report.css | 2767 | 2020-04-15 10:11:21 |
| Show.js | 1085 | 2020-04-15 10:11:21 |