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|---|---|---|
 0000950170-25-011079-index-headers.html | 2025-01-30 16:06:10 | |
| 0000950170-25-011079-index.html | 2025-01-30 16:06:10 | |
| 0000950170-25-011079.txt | 2025-01-30 16:06:10 | |
 0000950170-25-011079-xbrl.zip | 302167 | 2025-01-30 16:06:10 |
| FilingSummary.xml | 1724 | 2025-01-30 16:06:10 |
| Financial_Report.xlsx | 5746 | 2025-01-30 16:06:10 |
| fisi-20241231.htm | 54236 | 2025-01-30 16:06:10 |
| fisi-20241231.xsd | 25063 | 2025-01-30 16:06:10 |
| fisi-20241231_htm.xml | 4750 | 2025-01-30 16:06:10 |
| fisi-ex99_1.htm | 2183546 | 2025-01-30 16:06:10 |
 img145321324_0.jpg | 323901 | 2025-01-30 16:06:10 |
 img39886387_0.jpg | 323901 | 2025-01-30 16:06:10 |
| MetaLinks.json | 18164 | 2025-01-30 16:06:10 |
| R1.htm | 39712 | 2025-01-30 16:06:10 |
| report.css | 2767 | 2025-01-30 16:06:10 |
| Show.js | 1084 | 2025-01-30 16:06:10 |