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SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED) (Tables)
12 Months Ended
Dec. 31, 2016
Extractive Industries [Abstract]  
Schedule of Oil and Gas Reserve Quantities
Proved Reserves
Natural Gas
(Bcf)
 
Balance at December 31, 2016
469.8

Balance at December 31, 2015
522.4

Balance at December 31, 2014
530.4