Quarterly report pursuant to Section 13 or 15(d)

Contract Costs - Additional Information (Detail)

v3.2.0.727
Contract Costs - Additional Information (Detail)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Project
Customer
Jun. 30, 2014
USD ($)
Project
Dec. 31, 2014
USD ($)
Long-term Contracts or Programs Disclosure [Line Items]          
Pass-through costs as a percentage of revenue 39.50% 50.90% 39.50% 50.10%  
Costs and estimated earnings in excess of billings on uncompleted contracts, unbilled costs $ 25,358   $ 25,358   $ 26,989
Billings in excess of costs and estimated earnings, advances 9,228   $ 9,228   $ 18,766
Estimate to complete projects   $ 5,200   $ 5,200  
Number of projects orders changed | Project     3 3  
Project One          
Long-term Contracts or Programs Disclosure [Line Items]          
Estimate to complete projects 22,300   $ 22,300    
Percentage of complete projects     86.00%    
Project Two          
Long-term Contracts or Programs Disclosure [Line Items]          
Percentage of complete projects     96.00%    
Project Three          
Long-term Contracts or Programs Disclosure [Line Items]          
Percentage of complete projects     69.00%    
Unbilled Contract Costs          
Long-term Contracts or Programs Disclosure [Line Items]          
Costs and estimated earnings in excess of billings on uncompleted contracts, unbilled costs 17,100   $ 17,100    
Number of major customers | Customer     2    
Contract Advances          
Long-term Contracts or Programs Disclosure [Line Items]          
Number of major customers | Customer     2    
Billings in excess of costs and estimated earnings, advances $ 5,500   $ 5,500