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Revenue Recognition (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Contract assets, current | $ 0 | $ 0 |
Contract assets, noncurrent | 0 | 0 |
Deferred revenue and customer deposits | 36,198,000 | 36,198,000 | $ 5,607,000
Performance obligation | 55,684,000 | $ 55,684,000 |
Provision for doubtful accounts | $ 334,000 |  |
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 |

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- Definition Amount, before 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, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044 + Details
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