Document Format Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 1 | 8-K | fibk-20210128.htm iXBRL | 8-K | 41322 |
| 2 | EX-99.1 | fibk-20201231x8kpr.htm | EX-99.1 | 784623 |
| 3 | EX-99.2 | january2021ip.htm | EX-99.2 | 66447 |
| 9 | FIBK LOGO | fibslogo2linea041.jpg | GRAPHIC | 165531 |
| 10 | GRAPHIC | january2021ip001.jpg | GRAPHIC | 290824 |
| 11 | GRAPHIC | january2021ip002.jpg | GRAPHIC | 262641 |
| 12 | GRAPHIC | january2021ip003.jpg | GRAPHIC | 135306 |
| 13 | GRAPHIC | january2021ip004.jpg | GRAPHIC | 127395 |
| 14 | GRAPHIC | january2021ip005.jpg | GRAPHIC | 157997 |
| 15 | GRAPHIC | january2021ip006.jpg | GRAPHIC | 126014 |
| 16 | GRAPHIC | january2021ip007.jpg | GRAPHIC | 124993 |
| 17 | GRAPHIC | january2021ip008.jpg | GRAPHIC | 145673 |
| 18 | GRAPHIC | january2021ip009.jpg | GRAPHIC | 133689 |
| 19 | GRAPHIC | january2021ip010.jpg | GRAPHIC | 82204 |
| 20 | GRAPHIC | january2021ip011.jpg | GRAPHIC | 137301 |
| 21 | GRAPHIC | january2021ip012.jpg | GRAPHIC | 79481 |
| 22 | GRAPHIC | january2021ip013.jpg | GRAPHIC | 159017 |
| 23 | GRAPHIC | january2021ip014.jpg | GRAPHIC | 138643 |
| 24 | GRAPHIC | january2021ip015.jpg | GRAPHIC | 168486 |
| 25 | GRAPHIC | january2021ip016.jpg | GRAPHIC | 78916 |
| 26 | GRAPHIC | january2021ip017.jpg | GRAPHIC | 109607 |
| 27 | GRAPHIC | january2021ip018.jpg | GRAPHIC | 121946 |
| 28 | GRAPHIC | january2021ip019.jpg | GRAPHIC | 123279 |
| 29 | GRAPHIC | january2021ip020.jpg | GRAPHIC | 77663 |
| 30 | GRAPHIC | january2021ip021.jpg | GRAPHIC | 139375 |
| 31 | GRAPHIC | january2021ip022.jpg | GRAPHIC | 112037 |
| 32 | GRAPHIC | january2021ip023.jpg | GRAPHIC | 121584 |
| 33 | GRAPHIC | january2021ip024.jpg | GRAPHIC | 126446 |
| 34 | GRAPHIC | january2021ip025.jpg | GRAPHIC | 150274 |
| 35 | GRAPHIC | january2021ip026.jpg | GRAPHIC | 165176 |
| 36 | GRAPHIC | january2021ip027.jpg | GRAPHIC | 144182 |
| 37 | GRAPHIC | january2021ip028.jpg | GRAPHIC | 127467 |
| 38 | GRAPHIC | january2021ip029.jpg | GRAPHIC | 128428 |
| 39 | GRAPHIC | january2021ip030.jpg | GRAPHIC | 138476 |
| 40 | GRAPHIC | january2021ip031.jpg | GRAPHIC | 102107 |
| 41 | GRAPHIC | january2021ip032.jpg | GRAPHIC | 121688 |
| 42 | GRAPHIC | january2021ip033.jpg | GRAPHIC | 141793 |
| 43 | GRAPHIC | january2021ip034.jpg | GRAPHIC | 123530 |
| 44 | GRAPHIC | january2021ip035.jpg | GRAPHIC | 128743 |
| 45 | GRAPHIC | january2021ip036.jpg | GRAPHIC | 125561 |
| 46 | GRAPHIC | january2021ip037.jpg | GRAPHIC | 126176 |
| 47 | GRAPHIC | january2021ip038.jpg | GRAPHIC | 129703 |
| 48 | GRAPHIC | january2021ip039.jpg | GRAPHIC | 125202 |
| 49 | GRAPHIC | january2021ip040.jpg | GRAPHIC | 84416 |
| 50 | GRAPHIC | january2021ip041.jpg | GRAPHIC | 156718 |
| 51 | GRAPHIC | january2021ip042.jpg | GRAPHIC | 172299 |
| 52 | GRAPHIC | january2021ip043.jpg | GRAPHIC | 79043 |
| 53 | GRAPHIC | january2021ip044.jpg | GRAPHIC | 134568 |
| 54 | GRAPHIC | january2021ip045.jpg | GRAPHIC | 114189 |
| 55 | GRAPHIC | january2021ip046.jpg | GRAPHIC | 78941 |
| 56 | GRAPHIC | january2021ip047.jpg | GRAPHIC | 110042 |
| 57 | GRAPHIC | january2021ip048.jpg | GRAPHIC | 128451 |
| 58 | GRAPHIC | january2021ip049.jpg | GRAPHIC | 116631 |
| 59 | GRAPHIC | january2021ip050.jpg | GRAPHIC | 86163 |
| 60 | GRAPHIC | january2021ip051.jpg | GRAPHIC | 119592 |
| 61 | GRAPHIC | january2021ip052.jpg | GRAPHIC | 116001 |
| 62 | GRAPHIC | january2021ip053.jpg | GRAPHIC | 73243 |
| 63 | GRAPHIC | january2021ip054.jpg | GRAPHIC | 133591 |
| 64 | GRAPHIC | january2021ip055.jpg | GRAPHIC | 169053 |
| 65 | GRAPHIC | january2021ip056.jpg | GRAPHIC | 171878 |
| 66 | GRAPHIC | january2021ip057.jpg | GRAPHIC | 171857 |
| 67 | GRAPHIC | january2021ip058.jpg | GRAPHIC | 172361 |
| 68 | GRAPHIC | january2021ip059.jpg | GRAPHIC | 176576 |
| 69 | GRAPHIC | january2021ip060.jpg | GRAPHIC | 172167 |
| Complete submission text file | 0000860413-21-000015.txt | 12359217 |
Data Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 4 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | fibk-20210128.xsd | EX-101.SCH | 2411 |
| 5 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | fibk-20210128_cal.xml | EX-101.CAL | 702 |
| 6 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | fibk-20210128_def.xml | EX-101.DEF | 1635 |
| 7 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | fibk-20210128_lab.xml | EX-101.LAB | 24275 |
| 8 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | fibk-20210128_pre.xml | EX-101.PRE | 12638 |
| 70 | EXTRACTED XBRL INSTANCE DOCUMENT | fibk-20210128_htm.xml | XML | 10901 |
EIN.: 810331430 | State of Incorp.: MT | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-34653 | Film No.: 21565158
SIC: 6022 State Commercial Banks