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DERIVATIVES AND RISK MANAGEMENT ACTIVITIES Table 1 (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Derivatives, Fair Value |  |
Asset Derivatives | $ 26,277 | $ 42,022
Liability Derivatives | (23,194) | (33,905)
Designated as Hedging Instrument |  |
Derivatives, Fair Value |  |
Asset Derivatives | 402 | 0
Liability Derivatives | (13) | (130)
Designated as Hedging Instrument | Commodity contracts | Other current assets |  |
Derivatives, Fair Value |  |
Asset Derivatives | 402 | 0
Liability Derivatives | (13) | 0
Designated as Hedging Instrument | Commodity contracts | Accrued liabilities |  |
Derivatives, Fair Value |  |
Asset Derivatives | 0 | 0
Liability Derivatives | 0 | (130)
Not Designated as Hedging Instrument |  |
Derivatives, Fair Value |  |
Asset Derivatives | 25,875 | 42,022
Liability Derivatives | (23,181) | (33,775)
Not Designated as Hedging Instrument | Commodity contracts | Other current assets |  |
Derivatives, Fair Value |  |
Asset Derivatives | 17,941 | 16,168
Liability Derivatives | (13,056) | (11,220)
Not Designated as Hedging Instrument | Commodity contracts | Other long-term assets, net |  |
Derivatives, Fair Value |  |
Asset Derivatives | 1,151 | 15,883
Liability Derivatives | (357) | (8,906)
Not Designated as Hedging Instrument | Commodity contracts | Accrued liabilities |  |
Derivatives, Fair Value |  |
Asset Derivatives | 2,215 | 4,523
Liability Derivatives | (4,789) | (6,626)
Not Designated as Hedging Instrument | Commodity contracts | Other long-term liabilities |  |
Derivatives, Fair Value |  |
Asset Derivatives | 4,568 | 5,448
Liability Derivatives | $ (4,979) | $ (7,023)

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