Annual report pursuant to Section 13 and 15(d)

Contract Revenue and Percentage of Completion Method - Information with Respect to Uncompleted Contracts (Detail)

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Contract Revenue and Percentage of Completion Method - Information with Respect to Uncompleted Contracts (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Revenue Recognition [Abstract]    
Costs incurred on uncompleted contracts $ 437,658 $ 742,608
Estimated profit earned to date 7,777 53,551
Contract costs and estimated profits 445,435 796,159
Less billings to date 439,694 787,936
Net costs and estimated earnings in excess of billings $ 5,741 $ 8,223