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BASIS OF PRESENTATION (Details): - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2014
Sep. 30, 2015
Sep. 30, 2014
Significant Acquisitions and Disposals [Line Items]      
Proceeds from sale of oil and gas properties   $ 0 $ 6,000
Oil and gas properties in California      
Significant Acquisitions and Disposals [Line Items]      
Proceeds from sale of oil and gas properties $ 6,000    
Gain on sale of oil and gas properties     $ 6,200