XML 25 R43.htm IDEA: XBRL DOCUMENT v2.3.0.15
Costs And Estimated Earnings On Uncompleted Contracts (Narrative) (Details)
9 Months Ended12 Months Ended
Sep. 30, 2011
Dec. 31, 2010
Costs And Estimated Earnings On Uncompleted Contracts [Abstract]  
Costs and estimated earnings in excess of billings on uncompleted contracts, net of billings in excess of costs and estimated earnings81.80%81.40%
Number of significant customers55