Document Format Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 1 | 8-K | fibk-20201026.htm iXBRL | 8-K | 50733 |
| 2 | EX-99.1 | october2020ip.htm | EX-99.1 | 170965 |
| 8 | GRAPHIC | october2020ip001.jpg | GRAPHIC | 258221 |
| 9 | GRAPHIC | october2020ip002.jpg | GRAPHIC | 224957 |
| 10 | GRAPHIC | october2020ip003.jpg | GRAPHIC | 124337 |
| 11 | GRAPHIC | october2020ip004.jpg | GRAPHIC | 112573 |
| 12 | GRAPHIC | october2020ip005.jpg | GRAPHIC | 142350 |
| 13 | GRAPHIC | october2020ip006.jpg | GRAPHIC | 112154 |
| 14 | GRAPHIC | october2020ip007.jpg | GRAPHIC | 113358 |
| 15 | GRAPHIC | october2020ip008.jpg | GRAPHIC | 129279 |
| 16 | GRAPHIC | october2020ip009.jpg | GRAPHIC | 120475 |
| 17 | GRAPHIC | october2020ip010.jpg | GRAPHIC | 77446 |
| 18 | GRAPHIC | october2020ip011.jpg | GRAPHIC | 127209 |
| 19 | GRAPHIC | october2020ip012.jpg | GRAPHIC | 74764 |
| 20 | GRAPHIC | october2020ip013.jpg | GRAPHIC | 142603 |
| 21 | GRAPHIC | october2020ip014.jpg | GRAPHIC | 125595 |
| 22 | GRAPHIC | october2020ip015.jpg | GRAPHIC | 157874 |
| 23 | GRAPHIC | october2020ip016.jpg | GRAPHIC | 74346 |
| 24 | GRAPHIC | october2020ip017.jpg | GRAPHIC | 95349 |
| 25 | GRAPHIC | october2020ip018.jpg | GRAPHIC | 110440 |
| 26 | GRAPHIC | october2020ip019.jpg | GRAPHIC | 109634 |
| 27 | GRAPHIC | october2020ip020.jpg | GRAPHIC | 73142 |
| 28 | GRAPHIC | october2020ip021.jpg | GRAPHIC | 124541 |
| 29 | GRAPHIC | october2020ip022.jpg | GRAPHIC | 99317 |
| 30 | GRAPHIC | october2020ip023.jpg | GRAPHIC | 105858 |
| 31 | GRAPHIC | october2020ip024.jpg | GRAPHIC | 112775 |
| 32 | GRAPHIC | october2020ip025.jpg | GRAPHIC | 132903 |
| 33 | GRAPHIC | october2020ip026.jpg | GRAPHIC | 137926 |
| 34 | GRAPHIC | october2020ip027.jpg | GRAPHIC | 130713 |
| 35 | GRAPHIC | october2020ip028.jpg | GRAPHIC | 113906 |
| 36 | GRAPHIC | october2020ip029.jpg | GRAPHIC | 117070 |
| 37 | GRAPHIC | october2020ip030.jpg | GRAPHIC | 123139 |
| 38 | GRAPHIC | october2020ip031.jpg | GRAPHIC | 90699 |
| 39 | GRAPHIC | october2020ip032.jpg | GRAPHIC | 108582 |
| 40 | GRAPHIC | october2020ip033.jpg | GRAPHIC | 134905 |
| 41 | GRAPHIC | october2020ip034.jpg | GRAPHIC | 113109 |
| 42 | GRAPHIC | october2020ip035.jpg | GRAPHIC | 116505 |
| 43 | GRAPHIC | october2020ip036.jpg | GRAPHIC | 114353 |
| 44 | GRAPHIC | october2020ip037.jpg | GRAPHIC | 113619 |
| 45 | GRAPHIC | october2020ip038.jpg | GRAPHIC | 128421 |
| 46 | GRAPHIC | october2020ip039.jpg | GRAPHIC | 113305 |
| 47 | GRAPHIC | october2020ip040.jpg | GRAPHIC | 79030 |
| 48 | GRAPHIC | october2020ip041.jpg | GRAPHIC | 139694 |
| 49 | GRAPHIC | october2020ip042.jpg | GRAPHIC | 156633 |
| 50 | GRAPHIC | october2020ip043.jpg | GRAPHIC | 74488 |
| 51 | GRAPHIC | october2020ip044.jpg | GRAPHIC | 120253 |
| 52 | GRAPHIC | october2020ip045.jpg | GRAPHIC | 109995 |
| 53 | GRAPHIC | october2020ip046.jpg | GRAPHIC | 74342 |
| 54 | GRAPHIC | october2020ip047.jpg | GRAPHIC | 98286 |
| 55 | GRAPHIC | october2020ip048.jpg | GRAPHIC | 118771 |
| 56 | GRAPHIC | october2020ip049.jpg | GRAPHIC | 103593 |
| 57 | GRAPHIC | october2020ip050.jpg | GRAPHIC | 81285 |
| 58 | GRAPHIC | october2020ip051.jpg | GRAPHIC | 105171 |
| 59 | GRAPHIC | october2020ip052.jpg | GRAPHIC | 108574 |
| 60 | GRAPHIC | october2020ip053.jpg | GRAPHIC | 68023 |
| 61 | GRAPHIC | october2020ip054.jpg | GRAPHIC | 124671 |
| 62 | GRAPHIC | october2020ip055.jpg | GRAPHIC | 114345 |
| 63 | GRAPHIC | october2020ip056.jpg | GRAPHIC | 115571 |
| 64 | GRAPHIC | october2020ip057.jpg | GRAPHIC | 164779 |
| 65 | GRAPHIC | october2020ip058.jpg | GRAPHIC | 118905 |
| 66 | GRAPHIC | october2020ip059.jpg | GRAPHIC | 155962 |
| 67 | GRAPHIC | october2020ip060.jpg | GRAPHIC | 157368 |
| 68 | GRAPHIC | october2020ip061.jpg | GRAPHIC | 157786 |
| 69 | GRAPHIC | october2020ip062.jpg | GRAPHIC | 158226 |
| 70 | GRAPHIC | october2020ip063.jpg | GRAPHIC | 162091 |
| 71 | GRAPHIC | october2020ip064.jpg | GRAPHIC | 156909 |
| Complete submission text file | 0000860413-20-000232.txt | 11097033 |
Data Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 3 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | fibk-20201026.xsd | EX-101.SCH | 2411 |
| 4 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | fibk-20201026_cal.xml | EX-101.CAL | 702 |
| 5 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | fibk-20201026_def.xml | EX-101.DEF | 1635 |
| 6 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | fibk-20201026_lab.xml | EX-101.LAB | 24275 |
| 7 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | fibk-20201026_pre.xml | EX-101.PRE | 12638 |
| 72 | EXTRACTED XBRL INSTANCE DOCUMENT | fibk-20201026_htm.xml | XML | 10901 |
IRS No.: 810331430 | State of Incorp.: MT | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-34653 | Film No.: 201261588
SIC: 6022 State Commercial Banks
