Costs And Estimated Earnings On Uncompleted Contracts (Narrative) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2015 customer	Dec. 31, 2014 customer
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 earnings on uncompleted, percentage comprised by significant customers	97.00%	92.70%
Number of significant customers	8	8