BUSINESS SEGMENTS Additional Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Crude oil and natural gas segment
Depreciation, depletion and amortization from continuing operations	$ 50,363	$ 49,640	$ 49,636	$ 42,889	$ 37,748	$ 26,957	$ 25,488	$ 25,431	$ 192,528	$ 115,624	$ 91,111
Oil and Gas Properties
Crude oil and natural gas segment
Depreciation, depletion and amortization from continuing operations									$ 188,500	$ 111,600	$ 86,300