Goodwill And Intangible Assets (Summary Of Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 458	$ 478	$ 864	$ 939
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	353	390	657	755
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 105	$ 88	$ 207	$ 184