Description of the Plan - Payments of benefits and plan termination (Details) - Community Financial System, Inc. 401(k) Employee Stock Ownership Plan |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
USD ($)
| |
| Description of the Plan | |
| Participant normal retirement age | 65 years |
| Required years of service to be completed by participant for retirement | 5 years |
| Maximum account balance | $ 7,000 |
| Minimum account balance | $ 1,000 |
| Maximum age of participant for payment deferral | 65 years |
| Percentage of employee contributions as hardship withdrawals | 100.00% |
| Vesting percentage on termination | 100.00% |