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| Component: (Network and Table) | |
|---|---|
| Network | 2412407 - Disclosure - Employee Benefit Plans (Details 4) (http://tompkinstrustco.com/role/EmployeeBenefitPlansDetails4) |
| Table | Statement [Table] |
Slicers (applies to each fact value in each table cell)
| Reporting Entity [Axis] | 0001005817 (http://www.sec.gov/CIK) |
| Statement [Line Items] | Period [Axis] | ||||||||
|---|---|---|---|---|---|---|---|---|---|
2016-01-01 - 2016-12-31 | 2015-01-01 - 2015-12-31 | 2014-01-01 - 2014-12-31 | |||||||
| Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] | Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] | Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] | |||||||
| DB Pension Plan | Life and Healthcare Plan | SERPs | DB Pension Plan | Life and Healthcare Plan | SERPs | DB Pension Plan | Life and Healthcare Plan | SERPs | |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] | |||||||||
Discount Rates  | |||||||||
Benefit Cost for Plan Year | |||||||||
Benefit Obligation at End of Plan Year | |||||||||
Expected long-term return on plan assets | 7.25% | 7.25% | 7.25% | ||||||
Rate of compensation increase | |||||||||
Benefit Cost for Plan Year | |||||||||
Benefit Obligation at End of Plan Year | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | |