DERIVATIVE FINANCIAL INSTRUMENTS (Details 3) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair value of net derivatives
Derivative Assets, current		$ 4,005
Derivative Liabilities, current	$ 408
Derivative Liabilities, Non-current	61
Derivative Liabilities	469
Commodity derivatives \| Not designated as hedging instruments
Fair value of net derivatives
Derivative Assets	1,073	4,005
Derivative Liabilities	1,542
Commodity derivatives \| Not designated as hedging instruments \| Natural Gas
Fair value of net derivatives
Derivative Assets, current	1,073	3,611
Commodity derivatives \| Not designated as hedging instruments \| Oil
Fair value of net derivatives
Derivative Assets, current		$ 394
Derivative Liabilities, current	1,481
Derivative Liabilities, Non-current	$ 61

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