Oil and Gas Reserve Data - Summary of Proved Developed and Undeveloped Reserves (Details)	Mar. 31, 2014 bbl	Mar. 31, 2013 bbl	Mar. 31, 2012 bbl	Mar. 31, 2011 bbl
Proved Undeveloped Reserves	3,419,362	3,806,941
Oil [Member]
Proved Developed Reserves	294,620	237,420	194,620	159,975
Proved Undeveloped Reserves	206,930	128,290	151,733	130,187
Natural Gas [Member]
Proved Developed Reserves	4,081,470	4,807,020	5,359,670	4,964,061
Proved Undeveloped Reserves	2,177,810	3,037,180	3,085,064	3,792,974