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Revenue Recognition (Schedule Of Revenue Recognition) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 36,539		$ 16,044	$ 67,834	$ 19,783
Leasing revenues	815		1,414	1,890	2,872
Total revenues	37,354	$ 32,370	17,458	69,724	22,655
Railcar Sales [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	34,371		13,746	63,300	15,272
Parts Sales [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	2,168		2,297	4,496	4,510
Other sales [Member]
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 0		$ 1	$ 38	$ 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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