Goodwill And Intangible Assets (Summary Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 26,489	$ 26,389
Less: accumulated amortization	(23,414)	(23,114)
Less: impairment charges	(17)	(17)
Net intangible assets other than goodwill	3,058	3,258
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	12,396	12,335
Less: accumulated amortization	(12,064)	(12,002)
Net intangible assets other than goodwill	332	333
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	9,058	9,058
Less: accumulated amortization	(7,707)	(7,660)
Net intangible assets other than goodwill	1,351	1,398
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	5,035	4,996
Less: accumulated amortization	(3,643)	(3,452)
Less: impairment charges	(17)	(17)
Net intangible assets other than goodwill	$ 1,375	$ 1,527