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Revenue From Contracts With Customers (Tables) | 9 Months Ended
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Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Revenue by major end market (amounts in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Heavy Highway | $ | 151,882 |  |  | $ | 179,608 |  |  | $ | 385,843 |  |  | $ | 438,741 |
Commercial | 32,261 |  |  | 15,209 |  |  | 89,890 |  |  | 27,050 |
Aviation | 30,587 |  |  | 22,863 |  |  | 81,671 |  |  | 56,310 |
Water Containment and Treatment | 18,457 |  |  | 20,518 |  |  | 48,973 |  |  | 43,388 |
Other | 21,357 |  |  | 25,080 |  |  | 58,691 |  |  | 60,398 |
Heavy Civil Construction Revenue | $ | 254,544 |  |  | $ | 263,278 |  |  | $ | 665,068 |  |  | $ | 625,887 |
Revenue by contract type (amounts in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Fixed Unit Price | $ | 208,070 |  |  | $ | 230,002 |  |  | $ | 562,791 |  |  | $ | 564,797 |
Lump Sum and Other | 46,474 |  |  | 33,276 |  |  | 102,277 |  |  | 61,090 |
Heavy Civil Construction Revenue | $ | 254,544 |  |  | $ | 263,278 |  |  | $ | 665,068 |  |  | $ | 625,887 |
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):
| September 30, 2018 |  | December 31, 2017
Costs and estimated earnings in excess of billings on uncompleted contracts | $ | 40,275 |  |  | $ | 37,112 |
Billings in excess of costs and estimated earnings on uncompleted contracts | (63,964 | ) |  | (62,374 | )
Net amount of billings in excess of costs and estimated earnings on uncompleted contracts | $ | (23,689 | ) |  | $ | (25,262 | )

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