Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-21-000200-index-headers.html | 2021-08-20 17:28:02 | |
| 0000860413-21-000200-index.html | 2021-08-20 17:28:02 | |
| 0000860413-21-000200.txt | 2021-08-20 17:28:02 | |
 0000860413-21-000200-xbrl.zip | 81971 | 2021-08-20 17:28:02 |
| ex-101_krileyxempxagmt.htm | 111174 | 2021-08-20 17:28:02 |
| ex-102_mmutchxempxagmt.htm | 108051 | 2021-08-20 17:28:02 |
| ex-103_jhubbellxempxagmt.htm | 109257 | 2021-08-20 17:28:02 |
| ex-104_rleexempxagmt.htm | 116533 | 2021-08-20 17:28:02 |
| fibk-20210819.htm | 48506 | 2021-08-20 17:28:02 |
| fibk-20210819.xsd | 1890 | 2021-08-20 17:28:02 |
| fibk-20210819_htm.xml | 10896 | 2021-08-20 17:28:02 |
| fibk-20210819_lab.xml | 24137 | 2021-08-20 17:28:02 |
| fibk-20210819_pre.xml | 12500 | 2021-08-20 17:28:02 |
| FilingSummary.xml | 1766 | 2021-08-20 17:28:02 |
| Financial_Report.xlsx | 5676 | 2021-08-20 17:28:02 |
| MetaLinks.json | 16583 | 2021-08-20 17:28:02 |
| R1.htm | 38583 | 2021-08-20 17:28:02 |
| report.css | 2767 | 2021-08-20 17:28:02 |
| Show.js | 1085 | 2021-08-20 17:28:02 |