Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-24-000047-index-headers.html | 2024-04-04 16:58:05 | |
| 0000860413-24-000047-index.html | 2024-04-04 16:58:05 | |
| 0000860413-24-000047.txt | 2024-04-04 16:58:05 | |
 0000860413-24-000047-xbrl.zip | 13370 | 2024-04-04 16:58:05 |
| fibk-20240402.htm | 33913 | 2024-04-04 16:58:05 |
| fibk-20240402.xsd | 1892 | 2024-04-04 16:58:05 |
| fibk-20240402xex991_jscott.htm | 13424 | 2024-04-04 16:58:05 |
| fibk-20240402_htm.xml | 2723 | 2024-04-04 16:58:05 |
| fibk-20240402_lab.xml | 21885 | 2024-04-04 16:58:05 |
| fibk-20240402_pre.xml | 12502 | 2024-04-04 16:58:05 |
| FilingSummary.xml | 1884 | 2024-04-04 16:58:05 |
| Financial_Report.xlsx | 5694 | 2024-04-04 16:58:05 |
| MetaLinks.json | 16850 | 2024-04-04 16:58:05 |
| R1.htm | 38093 | 2024-04-04 16:58:05 |
| report.css | 2767 | 2024-04-04 16:58:05 |
| Show.js | 1084 | 2024-04-04 16:58:05 |