Quarterly report pursuant to Section 13 or 15(d)

Contract Costs - Additional Information (Detail)

v2.4.0.6
Contract Costs - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Project
Jun. 30, 2011
Project
Long-term Contracts or Programs Disclosure [Line Items]        
Percentage of pass-through costs included in revenue 42.10% 50.40% 39.10% 46.40%
Total revenue recorded in relation to orders change in projects     $ 2,100,000 $ 784,000
Number of projects orders changed     2 2
Recognized contract losses $ 673,000 $ 688,000 $ 762,000 $ 1,100,000