Goodwill And Intangible Assets (Summary Of Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 134	$ 254	$ 329	$ 356
Beneficial Lease Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	29	25	59	50
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization	$ 105	$ 229	$ 270	$ 306