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Revenue Recognition (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Contract assets	$ 0	$ 445
Deferred revenue and customer deposits	455	$ 6,930
Performance obligation	$ 0
Minimum [Member] | Railcar Sales [Member]
Disaggregation of Revenue [Line Items]
Accounts Receivable, Term	5 days
Minimum [Member] | Parts Sales [Member]
Disaggregation of Revenue [Line Items]
Accounts Receivable, Term	30 days
Maximum [Member] | Railcar Sales [Member]
Disaggregation of Revenue [Line Items]
Accounts Receivable, Term	10 days
Maximum [Member] | Parts Sales [Member]
Disaggregation of Revenue [Line Items]
Accounts Receivable, Term	45 days

X

- Definition

Accounts Receivable, Term

+ References

No definition available.

+ Details

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
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-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

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- Details

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Period Type:

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- Details

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