Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001104659-20-062962-index-headers.html | 2020-05-18 08:30:43 | |
| 0001104659-20-062962-index.html | 2020-05-18 08:30:43 | |
| 0001104659-20-062962.txt | 2020-05-18 08:30:43 | |
 0001104659-20-062962-xbrl.zip | 108690 | 2020-05-18 08:30:43 |
| fibk-20200515.xsd | 3174 | 2020-05-18 08:30:43 |
| fibk-20200515_lab.xml | 34591 | 2020-05-18 08:30:43 |
| fibk-20200515_pre.xml | 22702 | 2020-05-18 08:30:43 |
| FilingSummary.xml | 1674 | 2020-05-18 08:30:43 |
| Financial_Report.xlsx | 5791 | 2020-05-18 08:30:43 |
| MetaLinks.json | 38444 | 2020-05-18 08:30:43 |
| R1.htm | 38615 | 2020-05-18 08:30:43 |
| report.css | 2766 | 2020-05-18 08:30:43 |
| Show.js | 1085 | 2020-05-18 08:30:43 |
| tm2012377d9_8k.htm | 36192 | 2020-05-18 08:30:43 |
| tm2012377d9_8k_htm.xml | 3508 | 2020-05-18 08:30:43 |
| tm2012377d9_ex4-1.htm | 482961 | 2020-05-18 08:30:43 |
| tm2012377d9_ex4-2.htm | 190627 | 2020-05-18 08:30:43 |