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Property, Plant and Equipment (Details 1) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Sep. 30, 2010
Components of Railcar and other assets leased to others   
Railcar leased to others$ 256,219$ 234,667$ 233,537
Less accumulated depreciation72,87366,18463,843
Railcar assets leased to others, net$ 183,346$ 168,483$ 169,694