XML 147 R100.htm IDEA: XBRL DOCUMENT v3.10.0.1
COMMITMENTS AND CONTINGENCIES (Minimum Royalties Under Mineral Leases) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
COMMITMENTS AND CONTINGENCIES [Abstract]  
2019 $ 23,211
2020-2021 36,630
2022-2023 26,014
Thereafter 154,720
Total $ 240,575