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Derivative Financial Instruments - Estimated Fair Value of Derivative Contracts (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
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| Derivatives Fair Value [Line Items] | |
| Fair value of commodity derivative contracts | $ 141us-gaap_DerivativeFairValueOfDerivativeAsset |
| Fair value of commodity derivative contracts | 9,423us-gaap_DerivativeFairValueOfDerivativeLiability |
| Prepaid And Other Assets | |
| Derivatives Fair Value [Line Items] | |
| Fair value of commodity derivative contracts |
141us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember |
| Accrued Liabilities | |
| Derivatives Fair Value [Line Items] | |
| Fair value of commodity derivative contracts |
$ 9,423us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_InformationByFinancialStatementLineItemAxis = us-gaap_AccruedLiabilitiesMember |
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- Definition
Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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