Acquisitions Tulsa East-Lovington (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010 Tulsa East / Lovington [Member]	Mar. 31, 2010 Tulsa East / Lovington [Member] bbl	Mar. 31, 2010 Tulsa East / Lovington [Member] Hydrocarbon Storage Tanks [Member]	Mar. 31, 2010 Tulsa East / Lovington [Member] Asphalt Loading Rack Facility [Member]
Business Acquisition [Line Items]
Storage Capacity, Hydrocarbon Storage Tanks					2,000,000
Business Acquisition, Cost of Acquired Entity, Purchase Price						$ 88,600,000	$ 4,400,000
Property, Plant and Equipment, Additions				35,500,000
Purchase Price in Excess of Transferred Basis in Assets Acquired	$ 0	$ 57,560,000	$ 3,120,000	$ 57,600,000