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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Schedule Of Inventory [Line Items]    
Fuel-wholesale consignment $ 1,581 $ 1,960
Fuel-other wholesale 13,115 340
Other 778 681
Inventories, net $ 15,474 $ 2,981