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Accounts Receivable (Tables) | 12 Months Ended
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Dec. 31, 2015
Receivables [Abstract] |
Schedule of Accounts Receivable | Accounts receivable at December 31 consisted of the following (in thousands):
| 2015 |  | 2014
Trade accounts receivable | $ | 102,277 |  |  | $ | 105,421 |
Contract receivables: |  |  |
Amounts billed | 53,830 |  |  | — |
Costs in excess of billings | 13,730 |  |  | — |
Total contract receivables | 67,560 |  |  | — |
Total accounts receivables | 169,837 |  |  | 105,421 |
Less allowance for doubtful accounts | (4,868 | ) |  | (4,280 | )
Accounts receivable | $ | 164,969 |  |  | $ | 101,141 |

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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 + Details
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