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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Summary of Significant Accounting Policies  
Schedule of cash paid

Cash paid (in thousands) for:

 
   Year Ended December 31,  
 
   2013   2012   2011  

Interest

   $ 799   $ 1,326   $ 1,720  

Income taxes for continuing operations

     15,821     13,948     1,613  

Income taxes for discontinued operations

     —     5     8  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Total

   $ 16,620   $ 15,279   $ 3,341  
               
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Schedule of contracts in progress

Contracts in progress are as follows (in thousands):

 
   December 31,  
 
   2013   2012  

Costs incurred on contracts in progress

   $ 989,072   $ 1,182,085  

Estimated earnings, net of losses

     126,431     134,534  

Less—Billings to date

     (1,151,969 )   (1,364,229 )
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ (36,466 ) $ (47,610 )
           
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​ ​ ​ ​ ​ ​ ​ ​
           

Costs and estimated earnings in excess of billings

   $ 28,122   $ 26,204  

Billings in excess of costs and estimated earnings

     (64,588 )   (73,814 )
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ (36,466 ) $ (47,610 )
           
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