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Accounts Receivable (Tables) | 6 Months Ended
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Jun. 30, 2017
Receivables [Abstract] |
Schedule of Accounts Receivable | Accounts receivable consists of the following (in thousands):
| June 30, 2017 |  | December 31, 2016
Trade accounts receivable | $ | 101,578 |  |  | $ | 81,193 |
Contract receivables: |  |  |
Amounts billed | 35,658 |  |  | 41,569 |
Costs in excess of billings | 7,007 |  |  | 6,582 |
Total contract receivables | 42,665 |  |  | 48,151 |
Total accounts receivable | 144,243 |  |  | 129,344 |
Less allowance for doubtful accounts | (5,372 | ) |  | (5,272 | )
Accounts receivable | $ | 138,871 |  |  | $ | 124,072 |

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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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