Derivative Financial Instruments (Details 2) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Noncurrent Liabilities
Offsetting liabilities
Gross Liabilities		$ 1,900,000
Gross Amounts Offset		(100,000)
Net Liabilities Presented		1,800,000
Cash Collateral Not Offset		0
Net Amount		1,800,000
Refining LLC \| Current Assets
Offsetting assets
Gross Assets	75,800,000	4,300,000
Gross Amounts Offset	(5,100,000)	(3,400,000)
Net Assets Presented	70,700,000	900,000
Cash Collateral Not Offset	0	0
Net Amount	70,700,000	900,000
Refining LLC \| Noncurrent Assets
Offsetting assets
Gross Assets	1,700,000	100,000
Gross Amounts Offset	(200,000)	0
Net Assets Presented	1,500,000	100,000
Cash Collateral Not Offset	0	0
Net Amount	1,500,000	100,000
Refining LLC \| Current Liabilities
Offsetting liabilities
Gross Liabilities		31,400,000
Gross Amounts Offset		(16,100,000)
Net Liabilities Presented		15,300,000
Cash Collateral Not Offset		0
Net Amount		15,300,000
Commodity Swaps \| Refining LLC \| Current Assets
Offsetting assets
Gross Assets	75,800,000	4,300,000
Gross Amounts Offset	(5,100,000)	(3,400,000)
Net Assets Presented	70,700,000	900,000
Cash Collateral Not Offset	0	0
Net Amount	70,700,000	900,000
Commodity Swaps \| Refining LLC \| Noncurrent Assets
Offsetting assets
Gross Assets	1,700,000	100,000
Gross Amounts Offset	(200,000)	0
Net Assets Presented	1,500,000	100,000
Cash Collateral Not Offset	0	0
Net Amount	1,500,000	100,000
Commodity Swaps \| Refining LLC \| Current Liabilities
Offsetting liabilities
Gross Liabilities		31,400,000
Gross Amounts Offset		(16,100,000)
Net Liabilities Presented		15,300,000
Cash Collateral Not Offset		0
Net Amount		15,300,000
Commodity Swaps \| Refining LLC \| Noncurrent Liabilities
Offsetting liabilities
Gross Liabilities		1,900,000
Gross Amounts Offset		(100,000)
Net Liabilities Presented		1,800,000
Cash Collateral Not Offset		0
Net Amount		1,800,000
Interest Rate Swap
Offsetting liabilities
Gross Amounts Offset	$ 0	$ 0

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.

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