Goodwill And Intangible Assets (Summary Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 26,273	$ 25,451
Less: accumulated amortization	(22,285)	(21,131)
Less: impairment charges	(17)
Net intangible assets other than goodwill	3,971	4,320	$ 3,827
Beneficial Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	12,451	15,048
Less: accumulated amortization	(10,375)	(14,496)
Net intangible assets other than goodwill	2,076	552
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	9,058	7,258
Less: accumulated amortization	(7,377)	(5,449)
Net intangible assets other than goodwill	1,681	1,809
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	4,764	3,145
Less: accumulated amortization	(4,533)	(1,186)
Less: impairment charges	(17)
Net intangible assets other than goodwill	$ 214	$ 1,959