Costs And Estimated Earnings On Uncompleted Contracts (Summary Of Costs And Estimated Earnings On Uncompleted Contracts) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Costs And Estimated Earnings On Uncompleted Contracts [Abstract]
Costs incurred on uncompleted contracts	$ 121,782	$ 94,145
Estimated earnings	53,720	32,547
Billings to date	(153,216)	(108,070)
Costs and estimated earnings on uncompleted contracts	$ 22,286	$ 18,622