Oil and Gas Reserve Data (Unaudited) - Summary of Proved Developed and Undeveloped Reserves (Details)	Mar. 31, 2017 Mcf bbl MMBbls	Mar. 31, 2016 Mcf bbl MMBbls	Mar. 31, 2015 Mcf bbl	Mar. 31, 2014 Mcf bbl
Proved Developed Reserves | MMBbls	3,238,000
Proved Undeveloped Reserves | MMBbls	2,153,248	966,707
Oil [Member]
Proved Developed Reserves | bbl	399,880	350,180	283,670	294,620
Proved Undeveloped Reserves | bbl	1,724,420	734,170	376,070	206,930
Natural Gas [Member]
Proved Developed Reserves | Mcf	4,107,950	4,406,060	4,584,790	4,081,470
Proved Undeveloped Reserves | Mcf	2,572,960	1,395,220	1,703,790	2,177,810