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Accounts Receivable (Tables) | 6 Months Ended
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Jun. 30, 2017
Receivables [Abstract] |
Schedule of Accounts Receivable | As of June 30, 2017 and December 31, 2016, Accounts receivable consisted of the following:
(in thousands) | June 30, 2017 | December 31, 2016
Trade and other accounts receivable | $152,410 |  | $146,460 |
Bank promissory notes | 17,009 |  | 15,759 |
Revenue in excess of progress billings | 30,664 |  | 15,926 |
Allowance for doubtful accounts | (7,018 | ) | (6,952 | )
Total accounts receivable | $193,065 |  | $171,193
Schedule of Contract Receivables | As of June 30, 2017 and December 31, 2016, Contract Receivables consisted of the following:
(in thousands) | June 30, 2017 |  | December 31, 2016 |
Contract receivable | $21,581 |  | $14,045 |

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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://www.xbrl.org/2003/role/presentationRef -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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