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Accounts Receivable (Tables) | 12 Months Ended
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Dec. 31, 2019
Receivables [Abstract] |
Accounts Receivable Detail | Accounts receivable as of December 31, 2019 and 2018 are summarized as follows:
|  | December 31, |  |
|  | 2019 |  | 2018
Accounts receivable |  | $ | 79,675 |  |  | $ | 87,055 |
Allowance for doubtful accounts |  | (1,100) |  |  | (932) |
Accounts receivable - net |  | $ | 78,575 |  |  | $ | 86,123 |
The Company’s customers are principally in the transportation and energy infrastructure sectors. As of December 31, 2019 and 2018, trade receivables, net of allowance for doubtful accounts, from customers were as follows:
|  | December 31, |  |
|  | 2019 |  | 2018
Rail Products and Services |  | $ | 44,941 |  |  | $ | 43,180 |
Construction Products |  | 19,301 |  |  | 19,998 |
Tubular and Energy Services |  | 14,205 |  |  | 19,121 |
Trade accounts receivable - net |  | $ | 78,447 |  |  | $ | 82,299 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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