Annual report pursuant to Section 13 and 15(d)

Information with Respect to Uncompleted Contracts (Detail)

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Information with Respect to Uncompleted Contracts (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Long-term Contracts or Programs Disclosure [Line Items]    
Costs incurred on uncompleted contracts $ 659,422 $ 271,397
Estimated profit earned to date 21,883 23,769
Contract Costs And Estimated Profits 681,305 295,166
Less billings to date 683,486 331,547
Costs and Estimated Earnings in Excess of Billings $ (2,181) $ (36,381)