Annual report pursuant to Section 13 and 15(d)

Contracts Receivable - Amounts Due on Contracts (Detail)

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Contracts Receivable - Amounts Due on Contracts (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Long-term Contracts or Programs Disclosure [Line Items]    
Current receivables $ 98,579 $ 60,535
Retainage due within one year 111 1,298
Accounts Receivable, Gross 99,577 76,341
Less allowance for doubtful accounts 887 14,508
Accounts Receivable, Net 98,690 61,833
Completed Contracts [Member]
   
Long-term Contracts or Programs Disclosure [Line Items]    
Current receivables 3,885 3,320
Long term receivables due after one year      
Contracts In Progress [Member]
   
Long-term Contracts or Programs Disclosure [Line Items]    
Current receivables 95,581 71,723
Retainage due within one year $ 111 $ 1,298