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LEASES (ASSET RETIREMENT SCHEDULE TABLE) (DETAILS) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
LEASES [ABSTRACT]    
Beginning balance, asset retirement obligation $ 1,641 $ 1,941
Additions and modifications 333 (136)
Accretion 15 49
Settlements (128) (213)
Ending balance, asset retirement obligation $ 1,861 $ 1,641