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Contracts in Progress (Tables)
 12 Months Ended
Dec. 31, 2016
Contractors [Abstract]  
Contracts in progress
Contracts in progress are as follows at December 31, 2016 and December 31, 2015:
 
December 31,
2016
 
December 31,
2015
Costs incurred on uncompleted contracts
$
802,140

 
$
782,934

Estimated earnings
143,975

 
132,694

 
946,115

 
915,628

Less: Billings to date
(933,828
)
 
(884,504
)
 
$
12,287

 
$
31,124

Included in the accompanying consolidated balance sheets under the following captions:
 

 
 

Costs and estimated earnings in excess of billings on uncompleted contracts
39,968

 
$
59,608

Billings in excess of costs and estimated earnings on uncompleted contracts
(27,681
)
 
(28,484
)
 
$
12,287

 
$
31,124