Goodwill And Intangible Assets (Summary Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 26,141	$ 26,189
Less: Accumulated amortization	(23,809)	(23,758)
Less: Impairments	(40)	(40)
Net intangible assets other than goodwill	2,292	2,391
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	12,191	12,216
Less: Accumulated amortization	(11,954)	(11,964)
Net intangible assets other than goodwill	237	252
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	9,058	9,058
Less: Accumulated amortization	(7,878)	(7,838)
Net intangible assets other than goodwill	1,180	1,220
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	4,892	4,915
Less: Accumulated amortization	(3,977)	(3,956)
Less: Impairments	(40)	(40)
Net intangible assets other than goodwill	$ 875	$ 919