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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Aug. 01, 2019
Railcars Available for Lease, Useful Life	40 years
Goodwill, Impairment Loss		$ 21,521
Contract assets	$ 445
Contract liability	6,930	5,607
Performance obligation	4,284
Distribuciones Industrials [Member]
Related Party Transaction, Purchases from Related Party	440
Fasemex [Member]
Related Party Transaction, Expenses from Transactions with Related Party	$ 3,921
Maximum [Member]
Warranty period	5 years
Useful life of assets related to state and local incentives	16 years
Maximum [Member] | Railcar Sales [Member]
Contract payment term	10 days
Maximum [Member] | Parts Sales [Member]
Contract payment term	45 days
Minimum [Member]
Useful life of assets related to state and local incentives	7 years
Minimum [Member] | Railcar Sales [Member]
Contract payment term	5 days
Minimum [Member] | Parts Sales [Member]
Contract payment term	30 days
Manufacturing [Member]
Goodwill, Impairment Loss		21,521
Manufacturing [Member] | Valuation, Income Approach [Member]
Goodwill, Impairment Loss		$ 21,521
Weighted-average cost of capital			16.00%

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