Supplementary Information on Oil and Gas Producing Activities (Unaudited) (Details 3)	12 Months Ended
	Dec. 31, 2012 bbl	Dec. 31, 2011 bbl
Oil [Member]
Proved Reserves:
Beginning of the period	163,906	372,769
Revisions of previous estimates	(20,749)	(198,659)
Extensions and discoveries	6,740	5,672
Improved recovery Production	(16,162)	(15,876)
Purchases of minerals in place
Sales of minerals in place
End of period	133,735	163,906
Proved Developed Reserves, End of Year	129,468	163,906
Gas [Member]
Proved Reserves:
Beginning of the period	16,695,133	12,791,642
Revisions of previous estimates	838,105	4,559,552
Extensions and discoveries	29,356,710	2,713,069
Improved recovery Production	(2,950,943)	(3,369,131)
Purchases of minerals in place
Sales of minerals in place
End of period	43,939,005	16,695,133
Proved Developed Reserves, End of Year	28,072,921	16,695,133
NGL [Member]
Proved Reserves:
Beginning of the period	559,389
Revisions of previous estimates	224,307
Extensions and discoveries	976,248	595,505
Improved recovery Production	(110,071)	(36,116)
Purchases of minerals in place
Sales of minerals in place
End of period	1,649,873	559,389
Proved Developed Reserves, End of Year	1,037,577	559,389