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Costs and Estimated Earnings on Uncompleted Contracts - Schedule of Cost and Estimated Earnings on Uncompleted Contracts (Detail)
$ in Thousands
Sep. 30, 2017
USD ($)
Contractors [Abstract]  
Costs incurred on uncompleted contracts $ 70,403
Estimated earnings 38,691
Total 109,094
Less: Billings to date 108,798
Net under (over) billings $ 296