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|---|---|---|
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| 0000860413-13-000017-index.html | 2013-10-31 11:56:22 | |
| 0000860413-13-000017.txt | 2013-10-31 11:56:22 | |
 0000860413-13-000017-xbrl.zip | 302496 | 2013-10-31 11:56:22 |
| fibk-20130930.xml | 3959434 | 2013-10-31 11:56:22 |
| fibk-20130930.xsd | 52799 | 2013-10-31 11:56:22 |
| fibk-20130930x10q.htm | 2423433 | 2013-10-31 11:56:22 |
| fibk-20130930xex311.htm | 11969 | 2013-10-31 11:56:22 |
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| fibk-20130930xex32.htm | 4932 | 2013-10-31 11:56:22 |
| fibk-20130930_cal.xml | 141037 | 2013-10-31 11:56:22 |
| fibk-20130930_def.xml | 371956 | 2013-10-31 11:56:22 |
| fibk-20130930_lab.xml | 782548 | 2013-10-31 11:56:22 |
| fibk-20130930_pre.xml | 459721 | 2013-10-31 11:56:22 |
| FilingSummary.xml | 26255 | 2013-10-31 11:56:22 |
| Financial_Report.xls | 3206079 | 2013-10-31 11:56:22 |
| Financial_Report.xlsx | 334011 | 2013-10-31 11:56:22 |
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| report.css | 2740 | 2013-10-31 11:56:22 |
| Show.js | 1410 | 2013-10-31 11:56:22 |