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Costs, Estimated Earnings, and Related Billings on Uncompleted Contracts - Contracts in Progress (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Contracts in progress    
Costs incurred on uncompleted contracts $ 7,271 $ 7,743
Estimated earnings 2,172 2,247
Total cost and earnings of unbilled contracts 9,443 9,990
Billings on uncompleted contracts (7,152) (11,361)
Total Costs, estimated earnings, and related billing on uncompleted contracts $ 2,291 $ (1,371)