- 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+ Details

Asset Impairment - Additional Information (Details) (North Louisiana and East Texas Natural Gas and Oil Properties, USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013 bbl
Impaired Long-Lived Assets Held and Used [Line Items]
Sale price of gas and oil properties	$ 30.3egn_OilandGasSalesPrice
Oil
Impaired Long-Lived Assets Held and Used [Line Items]
Proved Developed Reserves (Volume)		91,000
Natural Gas
Impaired Long-Lived Assets Held and Used [Line Items]
Proved Developed Reserves (Volume)		23,000,000