Goodwill And Intangible Assets (Summary Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 24,634	$ 24,707
Less: accumulated amortization	(22,682)	(22,661)
Less: impairment	(8)	(8)
Net intangible assets other than goodwill	1,944	2,038
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	11,247	11,283
Less: accumulated amortization	(11,070)	(11,089)
Net intangible assets other than goodwill	177	194
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	9,024	9,024
Less: accumulated amortization	(7,997)	(7,961)
Net intangible assets other than goodwill	1,027	1,063
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	4,363	4,400
Less: accumulated amortization	(3,615)	(3,611)
Less: impairment	(8)	(8)
Net intangible assets other than goodwill	$ 740	$ 781