Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860413-20-000025-index-headers.html | 2020-02-19 16:34:30 | |
| 0000860413-20-000025-index.html | 2020-02-19 16:34:30 | |
| 0000860413-20-000025.txt | 2020-02-19 16:34:30 | |
 0000860413-20-000025-xbrl.zip | 14728 | 2020-02-19 16:34:30 |
| ex991-specialdividendd.htm | 7788 | 2020-02-19 16:34:30 |
 fibbancsyst2line4ca28.jpg | 223148 | 2020-02-19 16:34:30 |
| fibk-20200219.xsd | 4557 | 2020-02-19 16:34:30 |
| fibk-20200219x8k.htm | 48581 | 2020-02-19 16:34:30 |
| fibk-20200219x8k_htm.xml | 4344 | 2020-02-19 16:34:30 |
| fibk-20200219_cal.xml | 600 | 2020-02-19 16:34:30 |
| fibk-20200219_def.xml | 1450 | 2020-02-19 16:34:30 |
| fibk-20200219_lab.xml | 26142 | 2020-02-19 16:34:30 |
| fibk-20200219_pre.xml | 13556 | 2020-02-19 16:34:30 |
| FilingSummary.xml | 1731 | 2020-02-19 16:34:30 |
| Financial_Report.xlsx | 5790 | 2020-02-19 16:34:30 |
| MetaLinks.json | 18172 | 2020-02-19 16:34:30 |
| R1.htm | 38617 | 2020-02-19 16:34:30 |
| report.css | 2767 | 2020-02-19 16:34:30 |
| Show.js | 1085 | 2020-02-19 16:34:30 |