$ 13,803

$ 11,672

(6,305)

(7,686)

7,498

3,986

Liability Derivatives [Abstracts]

10,184

10,806

(6,305)

(7,686)

Commodity-Related Derivatives [Member]

3,879

3,120

Asset Derivatives [Abstracts]

13,063

9,533

(5,565)

(5,547)

7,498

3,986

Liability Derivatives [Abstracts]

8,132

7,127

(5,565)

(5,547)

Interest Rate Swaps [Member]

2,567

1,580

Asset Derivatives [Abstracts]

740

2,139

(740)

(2,139)

Liability Derivatives [Abstracts]

2,052

3,679

(740)

(2,139)

$ 1,312

$ 1,540

Fair value of liability associated with 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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226003-175313

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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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Fair value of asset associated with 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.