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Revenue Sources and Concentration of Sales (Schedule of Revenue Sources and Concentration of Sales) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues	$ 79,241	$ 72,025	$ 118,672	$ 139,536	$ 135,523	$ 113,461	$ 126,157	$ 148,590	$ 409,474	$ 523,731	$ 772,854
Railcar sales [Member]
Revenues									398,095	513,543	743,135
Parts sales [Member]
Revenues									8,874	7,573	9,845
Leasing revenues [Member]
Revenues									2,298	2,605	2,654
Maintenance and Repair [Member]
Revenues									77	10	17,020
Other sales [Member]
Revenues									$ 130	$ 0	$ 200

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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