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FAIR VALUE MEASUREMENTS (Details) - EBP 002 - USD ($) | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | $ 231,205,141 | $ 214,021,631
Level 1 |  |
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | 226,336,720 | 208,372,306
Tompkins Financial Corporation common stock |  |
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | 8,256,435 | 9,202,840
Tompkins Financial Corporation common stock | Level 1 |  |
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | 8,256,435 | 9,202,840
Collective investment trusts at NAV |  |
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | 4,868,421 | 5,649,325
Collective investment trusts at NAV | Level 1 |  |
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | 0 | 0
Mutual funds |  |
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | 218,080,285 | 199,169,466
Mutual funds | Level 1 |  |
EBP, Investment, Fair Value and NAV [Line Items] |  |
TOTAL INVESTMENTS | $ 218,080,285 | $ 199,169,466

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