COMMITMENTS AND CONTINGENCIES (Minimum Royalties Under Mineral Leases) (Details) $ in Thousands |
Dec. 31, 2020
USD ($)
|
---|---|
COMMITMENTS AND CONTINGENCIES [Abstract] | |
2021 | $ 27,210 |
2022-2023 | 43,491 |
2024-2025 | 27,712 |
Thereafter | 167,147 |
Total | $ 265,560 |