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LEASES (ASSET RETIREMENT SCHEDULE TABLE) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
LEASES [ABSTRACT]    
Beginning balance, asset retirement obligation $ 2,482 $ 1,938
Additions and modifications 788 1,153
Accretion 26 14
Settlements (292) (623)
Ending balance, asset retirement obligation $ 3,004 $ 2,482