Goodwill And Intangible Assets (Summary Of Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 406	$ 461
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	304	365
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 102	$ 96