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Revenue From Contracts With Customers (Tables)
 3 Months Ended
Mar. 31, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
 Revenue by major end market
Three Months Ended March 31,
 
2019
 
2018
Heavy Highway
$
93,610

 
$
107,408

Commercial
30,850

 
28,519

Aviation
29,937

 
23,252

Water Containment and Treatment
15,234

 
14,995

Other
11,553

 
13,067

Total Heavy Civil Construction Revenue
$
181,184

 
$
187,241


 Revenue by contract type
Three Months Ended March 31,
 
2019
 
2018
Fixed Unit Price
$
141,219

 
$
160,236

Lump Sum and Other
39,965

 
27,005

Total Heavy Civil Construction Revenue
$
181,184

 
$
187,241
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:
 
March 31,
2019
 
December 31,
2018
Costs and estimated earnings in excess of billings on uncompleted contracts
$
44,133

 
$
41,542

Billings in excess of costs and estimated earnings on uncompleted contracts
(55,598
)
 
(62,407
)
Net amount of billings in excess of costs and estimated earnings on uncompleted contracts
$
(11,465
)
 
$
(20,865
)