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Revenue Recognition (Schedule Of Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 57,499			$ 23,967		$ 125,333	$ 43,750
Leasing revenues	808			1,235		2,698	4,107
Total revenues	58,307	$ 37,354	$ 32,370	25,202	$ 69,724	128,031	47,857
Railcar Sales [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	55,043			21,400		118,343	36,672
Parts Sales [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,381			2,567		6,877	7,077
Other sales [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 75			$ 0		$ 113	$ 1

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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