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Construction Contracts (Tables)
 12 Months Ended
Dec. 31, 2016
Contractors [Abstract]  
Net position of uncompleted construction contracts
The Company’s net position on uncompleted construction contracts comprised the following as of December 31, 2016 and 2015 (in thousands):
 
 
December 31, 
 
2016
 
2015
Costs incurred on uncompleted construction contracts
$
333,744

 
$
228,184

Estimated earnings
10,936

 
9,739

Billings
(354,737
)
 
(240,059
)
Net position
$
(10,057
)
 
$
(2,136
)
 
 
December 31,
 
2016
 
2015
Construction contract costs and estimated earnings in excess of billings
$
110

 
$
88

Billings in excess of construction contract costs and estimated earnings
(10,167
)
 
(2,224
)
Net position
$
(10,057
)
 
$
(2,136
)