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Contracts in Progress (Tables)
 6 Months Ended
Jun. 30, 2018
Contractors [Abstract]  
Summary of Contracts in Progress
Contracts in progress are as follows at June 30, 2018 and December 31, 2017:
 
June 30,
2018
 
December 31,
2017
Costs incurred on uncompleted contracts
$
739,863

 
$
668,848

Estimated earnings
140,773

 
120,751

 
880,636

 
789,599

Less: Billings to date
(852,418
)
 
(777,516
)
 
$
28,218

 
$
12,083

Included in the accompanying Consolidated Balance Sheet under the following captions:
 

 
 

Costs and estimated earnings in excess of billings on uncompleted contracts
$
53,287

 
$
46,006

Billings in excess of costs and estimated earnings on uncompleted contracts
(25,069
)
 
(33,923
)
 
$
28,218

 
$
12,083