Goodwill And Intangible Assets (Summary Of Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 386	$ 458	$ 688	$ 864
Beneficial Lease Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	292	353	499	657
Other Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 94	$ 105	$ 189	$ 207