Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-24-000125-index-headers.html | 2024-10-09 17:12:17 | |
| 0000860413-24-000125-index.html | 2024-10-09 17:12:17 | |
| 0000860413-24-000125.txt | 2024-10-09 17:12:17 | |
 0000860413-24-000125-xbrl.zip | 34897 | 2024-10-09 17:12:17 |
| fibk-20241009.htm | 44217 | 2024-10-09 17:12:17 |
| fibk-20241009.xsd | 1892 | 2024-10-09 17:12:17 |
| fibk-20241009xex101_reuter.htm | 127008 | 2024-10-09 17:12:17 |
| fibk-20241009xex991pr.htm | 9646 | 2024-10-09 17:12:17 |
| fibk-20241009_htm.xml | 2917 | 2024-10-09 17:12:17 |
| fibk-20241009_lab.xml | 21885 | 2024-10-09 17:12:17 |
| fibk-20241009_pre.xml | 12502 | 2024-10-09 17:12:17 |
 fibslogo2linea04.jpg | 165531 | 2024-10-09 17:12:17 |
| FilingSummary.xml | 1618 | 2024-10-09 17:12:17 |
| Financial_Report.xlsx | 5694 | 2024-10-09 17:12:17 |
| MetaLinks.json | 16850 | 2024-10-09 17:12:17 |
| R1.htm | 38092 | 2024-10-09 17:12:17 |
| report.css | 2767 | 2024-10-09 17:12:17 |
| Show.js | 1085 | 2024-10-09 17:12:17 |