MULTIEMPLOYER PENSION PLANS (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2019
USD ($)
employee
|
Dec. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
|
| MULTIEMPLOYER PENSION PLANS | |||
| Number of employees covered | employee | 100 | ||
| Contribution to multiemployer plans | $ | $ 1.5 | $ 1.1 | $ 1.5 |