BASIS OF PRESENTATION (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Oil and Gas Properties
Impairment On Oil And Gas Well Equipment And Supplies	$ 0
Discount rate for calculating present value of estimated future net revenues from proved reserves (as a percent)	10.00%
Impairment of oil and gas properties, after tax		$ 202,600,000
Impairment of oil and gas properties	$ 0	$ 318,786,000