Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001104659-25-065784-index-headers.html | 2025-07-03 16:09:33 | |
| 0001104659-25-065784-index.html | 2025-07-03 16:09:33 | |
| 0001104659-25-065784.txt | 2025-07-03 16:09:33 | |
 0001104659-25-065784-xbrl.zip | 11709 | 2025-07-03 16:09:33 |
| fibk-20250703.xsd | 3002 | 2025-07-03 16:09:33 |
| fibk-20250703_lab.xml | 34239 | 2025-07-03 16:09:33 |
| fibk-20250703_pre.xml | 22350 | 2025-07-03 16:09:33 |
| FilingSummary.xml | 1634 | 2025-07-03 16:09:33 |
| MetaLinks.json | 39059 | 2025-07-03 16:09:33 |
| R1.htm | 38079 | 2025-07-03 16:09:33 |
| report.css | 2766 | 2025-07-03 16:09:33 |
| Show.js | 1084 | 2025-07-03 16:09:33 |
| tm2519885d1_8k.htm | 30575 | 2025-07-03 16:09:33 |
| tm2519885d1_8k_htm.xml | 3572 | 2025-07-03 16:09:33 |