Annual report pursuant to Section 13 and 15(d)

Contract Revenue and Percentage of Completion Method - Uncompleted Contracts Included in Accompanying Consolidated Balance Sheets (Detail)

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Contract Revenue and Percentage of Completion Method - Uncompleted Contracts Included in Accompanying Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Revenue Recognition [Abstract]    
Costs and estimated earnings in excess of billings on uncompleted contracts $ 12,822 $ 26,989
Billings in excess of costs and estimated earnings on uncompleted contracts (7,081) (18,766)
Net costs and estimated earnings in excess of billings $ 5,741 $ 8,223