Costs And Estimated Earnings On Uncompleted Contracts (Summary Of Costs And Estimated Earnings On Uncompleted Contracts) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Contracts In Progress Costs And Earnings [Line Items]
Costs and estimated earnings on uncompleted contracts	$ 18,676	$ 18,622
Cost Incurred on Uncompleted Contracts [Member]
Contracts In Progress Costs And Earnings [Line Items]
Costs and estimated earnings on uncompleted contracts	102,086	94,145
Estimated Earnings [Member]
Contracts In Progress Costs And Earnings [Line Items]
Costs and estimated earnings on uncompleted contracts	42,934	32,547
Billings to Date [Member]
Contracts In Progress Costs And Earnings [Line Items]
Costs and estimated earnings on uncompleted contracts	$ (126,344)	$ (108,070)