Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000868671-23-000095-index-headers.html | 2023-05-02 16:33:42 | |
| 0000868671-23-000095-index.html | 2023-05-02 16:33:42 | |
| 0000868671-23-000095.txt | 2023-05-02 16:33:42 | |
 0000868671-23-000095-xbrl.zip | 461766 | 2023-05-02 16:33:42 |
| FilingSummary.xml | 47033 | 2023-05-02 16:33:42 |
| Financial_Report.xlsx | 151833 | 2023-05-02 16:33:42 |
| gbci-20230331.htm | 3952998 | 2023-05-02 16:33:42 |
| gbci-20230331.xsd | 66513 | 2023-05-02 16:33:42 |
| gbci-20230331_cal.xml | 177994 | 2023-05-02 16:33:42 |
| gbci-20230331_def.xml | 332025 | 2023-05-02 16:33:42 |
| gbci-20230331_htm.xml | 3670096 | 2023-05-02 16:33:42 |
| gbci-20230331_lab.xml | 919329 | 2023-05-02 16:33:42 |
| gbci-20230331_pre.xml | 625620 | 2023-05-02 16:33:42 |
| gbci-3312023xex311.htm | 10099 | 2023-05-02 16:33:42 |
| gbci-3312023xex312.htm | 10096 | 2023-05-02 16:33:42 |
| gbci-3312023xex32.htm | 6850 | 2023-05-02 16:33:42 |
| MetaLinks.json | 984443 | 2023-05-02 16:33:42 |
| R1.htm | 51524 | 2023-05-02 16:33:42 |
| R10.htm | 172356 | 2023-05-02 16:33:42 |
| R11.htm | 447422 | 2023-05-02 16:33:42 |
| R12.htm | 111101 | 2023-05-02 16:33:42 |
| R13.htm | 9668 | 2023-05-02 16:33:42 |
| R14.htm | 28453 | 2023-05-02 16:33:42 |
| R15.htm | 36739 | 2023-05-02 16:33:42 |
| R16.htm | 28542 | 2023-05-02 16:33:42 |
| R17.htm | 14321 | 2023-05-02 16:33:42 |
| R18.htm | 26584 | 2023-05-02 16:33:42 |
| R19.htm | 26940 | 2023-05-02 16:33:42 |
| R2.htm | 116971 | 2023-05-02 16:33:42 |
| R20.htm | 18829 | 2023-05-02 16:33:42 |
| R21.htm | 178791 | 2023-05-02 16:33:42 |
| R22.htm | 120099 | 2023-05-02 16:33:42 |
| R23.htm | 50268 | 2023-05-02 16:33:42 |
| R24.htm | 169254 | 2023-05-02 16:33:42 |
| R25.htm | 449988 | 2023-05-02 16:33:42 |
| R26.htm | 76374 | 2023-05-02 16:33:42 |
| R27.htm | 12188 | 2023-05-02 16:33:42 |
| R28.htm | 14199 | 2023-05-02 16:33:42 |
| R29.htm | 35050 | 2023-05-02 16:33:42 |
| R3.htm | 15101 | 2023-05-02 16:33:42 |
| R30.htm | 11798 | 2023-05-02 16:33:42 |
| R31.htm | 10232 | 2023-05-02 16:33:42 |
| R32.htm | 27036 | 2023-05-02 16:33:42 |
| R33.htm | 26391 | 2023-05-02 16:33:42 |
| R34.htm | 17789 | 2023-05-02 16:33:42 |
| R35.htm | 163642 | 2023-05-02 16:33:42 |
| R36.htm | 53642 | 2023-05-02 16:33:42 |
| R37.htm | 54771 | 2023-05-02 16:33:42 |
| R38.htm | 74114 | 2023-05-02 16:33:42 |
| R39.htm | 15313 | 2023-05-02 16:33:42 |
| R4.htm | 108770 | 2023-05-02 16:33:42 |
| R40.htm | 47155 | 2023-05-02 16:33:42 |
| R41.htm | 21224 | 2023-05-02 16:33:42 |
| R42.htm | 21233 | 2023-05-02 16:33:42 |
| R43.htm | 28871 | 2023-05-02 16:33:42 |
| R44.htm | 29038 | 2023-05-02 16:33:42 |
| R45.htm | 63089 | 2023-05-02 16:33:42 |
| R46.htm | 10054 | 2023-05-02 16:33:42 |
| R47.htm | 43127 | 2023-05-02 16:33:42 |
| R48.htm | 29664 | 2023-05-02 16:33:42 |
| R49.htm | 21630 | 2023-05-02 16:33:42 |
| R5.htm | 50219 | 2023-05-02 16:33:42 |
| R50.htm | 24756 | 2023-05-02 16:33:42 |
| R51.htm | 21341 | 2023-05-02 16:33:42 |
| R52.htm | 90485 | 2023-05-02 16:33:42 |
| R53.htm | 103029 | 2023-05-02 16:33:42 |
| R54.htm | 33342 | 2023-05-02 16:33:42 |
| R55.htm | 52499 | 2023-05-02 16:33:42 |
| R56.htm | 18151 | 2023-05-02 16:33:42 |
| R57.htm | 9032 | 2023-05-02 16:33:42 |
| R58.htm | 9068 | 2023-05-02 16:33:42 |
| R59.htm | 14548 | 2023-05-02 16:33:42 |
| R6.htm | 43248 | 2023-05-02 16:33:42 |
| R60.htm | 15808 | 2023-05-02 16:33:42 |
| R61.htm | 37637 | 2023-05-02 16:33:42 |
| R62.htm | 15723 | 2023-05-02 16:33:42 |
| R63.htm | 6601 | 2023-05-02 16:33:42 |
| R64.htm | 7724 | 2023-05-02 16:33:42 |
| R65.htm | 7026 | 2023-05-02 16:33:42 |
| R66.htm | 40348 | 2023-05-02 16:33:42 |
| R67.htm | 30427 | 2023-05-02 16:33:42 |
| R68.htm | 38077 | 2023-05-02 16:33:42 |
| R69.htm | 35393 | 2023-05-02 16:33:42 |
| R7.htm | 4512 | 2023-05-02 16:33:42 |
| R70.htm | 7137 | 2023-05-02 16:33:42 |
| R71.htm | 73822 | 2023-05-02 16:33:42 |
| R72.htm | 14934 | 2023-05-02 16:33:42 |
| R73.htm | 24648 | 2023-05-02 16:33:42 |
| R74.htm | 41992 | 2023-05-02 16:33:42 |
| R8.htm | 128383 | 2023-05-02 16:33:42 |
| R9.htm | 95551 | 2023-05-02 16:33:42 |
| report.css | 2767 | 2023-05-02 16:33:42 |
| Show.js | 1085 | 2023-05-02 16:33:42 |