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16. Oil and Gas Reserve Data - Summary of Proved Developed and Undeveloped Reserves (Details)	Mar. 31, 2015 bbl Mcf	Mar. 31, 2014 bbl Mcf	Mar. 31, 2013 bbl Mcf
Proved Undeveloped Reserves	3,960,232	3,419,362
Oil [Member]
Proved Developed Reserves	283,670	294,620	237,420
Proved Undeveloped Reserves	376,070	206,930	128,290
Natural Gas [Member]
Proved Developed Reserves | Mcf	4,584,790	4,081,470	4,807,020
Proved Undeveloped Reserves | Mcf	1,703,790	2,177,810	3,037,180

X

- Definition

Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 932



-SubTopic 235



-Section 50



-Paragraph 9



-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61884-109447



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 932



-SubTopic 235



-Section 50



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61797-109447

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X

- Definition

Net quantities of an enterprise's interests in proved undeveloped reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other renewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 932



-SubTopic 235



-Section 50



-Paragraph 9



-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61884-109447



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 932



-SubTopic 235



-Section 50



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61797-109447

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