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Note Payable and Capital Lease Obligations (Details) (USD $)
 6 Months Ended 12 Months Ended 6 Months Ended 1 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Jun. 30, 2012
Wynnewood Acquisition
Capital lease obligations assumed in acquisition
agreement
Jun. 30, 2012
Wynnewood Acquisition
Capital Lease related to Magellan Pipeline Terminals, L.P.
month
Jun. 30, 2012
Wynnewood Acquisition
Capital Lease related to Excel Pipeline
month
Mar. 31, 2011
Real property
Jun. 30, 2010
Real property
year
May 31, 2008
Real property
renewal
year
Note Payable and Capital Lease Obligations                  
Note payable balance     $ 9,900,000            
Borrowings on note payable 2,200,000   8,800,000            
Capital lease obligations                  
Initial contractual lease term (in years)                 1
Frequency of capital lease renewals                 3
Contractual lease renewal term (in years)               1  
Payment of capital lease obligations 452,000 4,855,000         4,700,000    
Number of lease agreements assumed in acquisition       2          
Remaining term of leases (in months)         207 208      
Outstanding obligation $ 851,911,000   $ 853,903,000 $ 52,800,000