Costs And Estimated Earnings On Uncompleted Contracts (Costs And Estimated Earnings On Uncompleted Contracts Accompanying Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Costs And Estimated Earnings On Uncompleted Contracts [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts	$ 29,209	$ 30,078
Billings in excess of costs and estimated earnings on uncompleted contracts (included in Other current liabilities)	(7,722)	(10,798)
Costs and estimated earnings on uncompleted contracts	$ 21,487	$ 19,280