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Derivatives - Open crude oil derivative positions (Details) (April 2014 - March 2015, crude oil derivative positions, USD $) | Mar. 31, 2014 bbl
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April 2014 - March 2015, crude oil derivative positions |
Volume | 6,000
Fixed Swap Price | $ 90

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- Definition The volume of a commodity or material specified in an investment contract. + References No definition available. + Details
Name: | invest_InvestmentContractVolume
Namespace Prefix: | invest_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

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- Definition Fixed price related to the price risk swap derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeSwapTypeFixedPrice
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant