Quarterly report pursuant to Section 13 or 15(d)

Costs and Estimated Earnings on Uncompleted Contracts - Schedule of Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Details)

v3.7.0.1
Costs and Estimated Earnings on Uncompleted Contracts - Schedule of Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Contractors [Abstract]    
Costs incurred on uncompleted contracts $ 94,817  
Estimated earnings 18,073  
Costs incurred on uncompleted contracts and estimated earnings 112,890  
Billings to date (122,304)  
Costs and estimated earnings on uncompleted contracts (9,414)  
Costs and estimated earnings in excess of billings 5,966
Billings in excess of costs and estimated earnings (15,380)  
Costs and estimated earnings on uncompleted contracts $ (9,414)