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Revenue From Contracts With Customers (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Revenue by major end market (amounts in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Heavy Highway | $ | 126,554 |  |  | $ | 149,749 |  |  | $ | 233,962 |  |  | $ | 259,135 |
Commercial | 29,110 |  |  | 8,733 |  |  | 57,628 |  |  | 11,840 |
Aviation | 27,832 |  |  | 22,857 |  |  | 51,084 |  |  | 33,447 |
Water Containment and Treatment | 15,521 |  |  | 13,274 |  |  | 30,516 |  |  | 22,870 |
Other | 24,267 |  |  | 14,581 |  |  | 37,334 |  |  | 35,318 |
Heavy Civil Construction Revenue | $ | 223,284 |  |  | $ | 209,194 |  |  | $ | 410,524 |  |  | $ | 362,610 |
Revenue by contract type (amounts in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Fixed Unit Price | $ | 194,486 |  |  | $ | 190,435 |  |  | $ | 354,721 |  |  | $ | 334,795 |
Lump Sum and Other | 28,798 |  |  | 18,759 |  |  | 55,803 |  |  | 27,815 |
Heavy Civil Construction Revenue | $ | 223,284 |  |  | $ | 209,194 |  |  | $ | 410,524 |  |  | $ | 362,610 |
Costs in Excess of Billings and Billings in Excess of Costs | The table below reconciles the net excess billings to the amounts included in the condensed consolidated balance sheets at those dates (amounts in thousands):
| June 30, 2018 |  | December 31, 2017
Costs and estimated earnings in excess of billings on uncompleted contracts | $ | 36,388 |  |  | $ | 37,112 |
Billings in excess of costs and estimated earnings on uncompleted contracts | (58,304 | ) |  | (62,374 | )
Net amount of costs and estimated earnings on uncompleted contracts below billings | $ | (21,916 | ) |  | $ | (25,262 | )

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- Definition Tabular disclosure for billings on uncompleted contracts in excess of costs and costs of uncompleted contracts in excess of billings. + References No definition available. + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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