EMPLOYEE BENEFIT PLANS - Schedule of Assumptions Used (Details) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Pension Plans | |||
| Projected benefit obligation | |||
| Discount rate beginning of year | 3.23% | 4.23% | |
| Net periodic pension cost | |||
| Discount rate | 4.23% | 3.56% | |
| Long-term rate of return on plan assets | 6.50% | 6.50% | |
| Non-qualified Supplemental Executive Retirement Plan | |||
| Projected benefit obligation | |||
| Discount rate beginning of year | 2.65% | 3.83% | 3.13% |