OTHER SUPPLEMENTAL INFORMATION (Schedule of Accounts Payable and Accrued Liabilities- Third Party) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Other Supplemental Information Disclosure [Abstract]
Costs for additions to oil and natural gas properties	$ 16,636	$ 13,951
Lease operating expenses	9,254	7,309
Interest	18,831	8,566
Production and ad valorem taxes	6,011	4,379
General and administrative expenses	2,069	2,596
Current portion of ARO	1,977	1,977
Deposit on sale of oil and natural properties	2,079
Derivative settlements	2,494	364
Other	1,394	1,029
Total	$ 60,745	$ 40,171