Property, Plant, Equiment and Railcars on Lease, net (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Components of property, plant and equipment
Property, plant and equipment, net	$ 159,375	$ 155,893
Operations/ Corporate: [Member]
Components of property, plant and equipment
Property, plant and equipment, gross	360,603	340,504
Less accumulated depreciation	(201,228)	(184,611)
Property, plant and equipment, net	159,375	155,893
Railcar Leasing [Member]
Components of property, plant and equipment
Property, plant and equipment, gross	388,060	225,992
Less accumulated depreciation	(15,509)	(5,710)
Property, plant and equipment, net	372,551	220,282
Buildings [Member] | Operations/ Corporate: [Member]
Components of property, plant and equipment
Property, plant and equipment, gross	155,937	151,545
Machinery and equipment [Member] | Operations/ Corporate: [Member]
Components of property, plant and equipment
Property, plant and equipment, gross	186,844	173,468
Land [Member] | Operations/ Corporate: [Member]
Components of property, plant and equipment
Property, plant and equipment, gross	3,335	3,335
Construction in process [Member] | Operations/ Corporate: [Member]
Components of property, plant and equipment
Property, plant and equipment, gross	$ 14,487	$ 12,156