Document Format Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 1 | 8-K/A | fibk-20200728.htm iXBRL | 8-K/A | 51662 |
| 2 | EX-99.1 | july2020ip.htm | EX-99.1 | 171790 |
| 8 | GRAPHIC | july2020ip001.jpg | GRAPHIC | 258851 |
| 9 | GRAPHIC | july2020ip002.jpg | GRAPHIC | 224640 |
| 10 | GRAPHIC | july2020ip003.jpg | GRAPHIC | 123953 |
| 11 | GRAPHIC | july2020ip004.jpg | GRAPHIC | 113203 |
| 12 | GRAPHIC | july2020ip005.jpg | GRAPHIC | 141918 |
| 13 | GRAPHIC | july2020ip006.jpg | GRAPHIC | 120903 |
| 14 | GRAPHIC | july2020ip007.jpg | GRAPHIC | 136250 |
| 15 | GRAPHIC | july2020ip008.jpg | GRAPHIC | 129312 |
| 16 | GRAPHIC | july2020ip009.jpg | GRAPHIC | 120496 |
| 17 | GRAPHIC | july2020ip010.jpg | GRAPHIC | 77414 |
| 18 | GRAPHIC | july2020ip011.jpg | GRAPHIC | 113688 |
| 19 | GRAPHIC | july2020ip012.jpg | GRAPHIC | 123251 |
| 20 | GRAPHIC | july2020ip013.jpg | GRAPHIC | 74777 |
| 21 | GRAPHIC | july2020ip014.jpg | GRAPHIC | 142577 |
| 22 | GRAPHIC | july2020ip015.jpg | GRAPHIC | 123511 |
| 23 | GRAPHIC | july2020ip016.jpg | GRAPHIC | 158001 |
| 24 | GRAPHIC | july2020ip017.jpg | GRAPHIC | 74347 |
| 25 | GRAPHIC | july2020ip018.jpg | GRAPHIC | 95386 |
| 26 | GRAPHIC | july2020ip019.jpg | GRAPHIC | 108097 |
| 27 | GRAPHIC | july2020ip020.jpg | GRAPHIC | 109020 |
| 28 | GRAPHIC | july2020ip021.jpg | GRAPHIC | 102985 |
| 29 | GRAPHIC | july2020ip022.jpg | GRAPHIC | 130886 |
| 30 | GRAPHIC | july2020ip023.jpg | GRAPHIC | 73169 |
| 31 | GRAPHIC | july2020ip024.jpg | GRAPHIC | 124734 |
| 32 | GRAPHIC | july2020ip025.jpg | GRAPHIC | 99683 |
| 33 | GRAPHIC | july2020ip026.jpg | GRAPHIC | 108397 |
| 34 | GRAPHIC | july2020ip027.jpg | GRAPHIC | 114553 |
| 35 | GRAPHIC | july2020ip028.jpg | GRAPHIC | 138166 |
| 36 | GRAPHIC | july2020ip029.jpg | GRAPHIC | 129450 |
| 37 | GRAPHIC | july2020ip030.jpg | GRAPHIC | 130423 |
| 38 | GRAPHIC | july2020ip031.jpg | GRAPHIC | 114796 |
| 39 | GRAPHIC | july2020ip032.jpg | GRAPHIC | 115796 |
| 40 | GRAPHIC | july2020ip033.jpg | GRAPHIC | 122821 |
| 41 | GRAPHIC | july2020ip034.jpg | GRAPHIC | 90167 |
| 42 | GRAPHIC | july2020ip035.jpg | GRAPHIC | 107896 |
| 43 | GRAPHIC | july2020ip036.jpg | GRAPHIC | 133585 |
| 44 | GRAPHIC | july2020ip037.jpg | GRAPHIC | 112927 |
| 45 | GRAPHIC | july2020ip038.jpg | GRAPHIC | 116163 |
| 46 | GRAPHIC | july2020ip039.jpg | GRAPHIC | 127252 |
| 47 | GRAPHIC | july2020ip040.jpg | GRAPHIC | 116455 |
| 48 | GRAPHIC | july2020ip041.jpg | GRAPHIC | 114357 |
| 49 | GRAPHIC | july2020ip042.jpg | GRAPHIC | 79043 |
| 50 | GRAPHIC | july2020ip043.jpg | GRAPHIC | 135416 |
| 51 | GRAPHIC | july2020ip044.jpg | GRAPHIC | 151963 |
| 52 | GRAPHIC | july2020ip045.jpg | GRAPHIC | 74480 |
| 53 | GRAPHIC | july2020ip046.jpg | GRAPHIC | 119855 |
| 54 | GRAPHIC | july2020ip047.jpg | GRAPHIC | 74332 |
| 55 | GRAPHIC | july2020ip048.jpg | GRAPHIC | 97882 |
| 56 | GRAPHIC | july2020ip049.jpg | GRAPHIC | 118400 |
| 57 | GRAPHIC | july2020ip050.jpg | GRAPHIC | 103357 |
| 58 | GRAPHIC | july2020ip051.jpg | GRAPHIC | 81308 |
| 59 | GRAPHIC | july2020ip052.jpg | GRAPHIC | 105168 |
| 60 | GRAPHIC | july2020ip053.jpg | GRAPHIC | 106272 |
| 61 | GRAPHIC | july2020ip054.jpg | GRAPHIC | 68035 |
| 62 | GRAPHIC | july2020ip055.jpg | GRAPHIC | 124774 |
| 63 | GRAPHIC | july2020ip056.jpg | GRAPHIC | 114439 |
| 64 | GRAPHIC | july2020ip057.jpg | GRAPHIC | 115616 |
| 65 | GRAPHIC | july2020ip058.jpg | GRAPHIC | 164796 |
| 66 | GRAPHIC | july2020ip059.jpg | GRAPHIC | 119420 |
| 67 | GRAPHIC | july2020ip060.jpg | GRAPHIC | 163881 |
| 68 | GRAPHIC | july2020ip061.jpg | GRAPHIC | 162335 |
| 69 | GRAPHIC | july2020ip062.jpg | GRAPHIC | 169964 |
| 70 | GRAPHIC | july2020ip063.jpg | GRAPHIC | 165495 |
| 71 | GRAPHIC | july2020ip064.jpg | GRAPHIC | 170698 |
| 72 | GRAPHIC | july2020ip065.jpg | GRAPHIC | 168532 |
| Complete submission text file | 0000860413-20-000187.txt | 11359319 |
Data Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 3 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | fibk-20200728.xsd | EX-101.SCH | 2411 |
| 4 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | fibk-20200728_cal.xml | EX-101.CAL | 702 |
| 5 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | fibk-20200728_def.xml | EX-101.DEF | 1635 |
| 6 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | fibk-20200728_lab.xml | EX-101.LAB | 24275 |
| 7 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | fibk-20200728_pre.xml | EX-101.PRE | 12638 |
| 73 | EXTRACTED XBRL INSTANCE DOCUMENT | fibk-20200728_htm.xml | XML | 11208 |
IRS No.: 810331430 | State of Incorp.: MT | Fiscal Year End: 1231
Type: 8-K/A | Act: 34 | File No.: 001-34653 | Film No.: 201052855
SIC: 6022 State Commercial Banks
