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Goodwill And Intangible Assets (Summary Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 26,511 | $ 26,273
Less: accumulated amortization | (22,497) | (22,285)
Less: impairment charges | (17) | (17)
Net intangible assets other than goodwill | 3,997 | 3,971
Beneficial Leases [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 12,426 | 12,451
Less: accumulated amortization | (10,393) | (10,375)
Net intangible assets other than goodwill | 2,033 | 2,076
Trade Name [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 9,058 | 9,058
Less: accumulated amortization | (7,448) | (7,377)
Net intangible assets other than goodwill | 1,610 | 1,681
Other Intangible Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 5,027 | 4,764
Less: accumulated amortization | (4,656) | (4,533)
Less: impairment charges | (17) | (17)
Net intangible assets other than goodwill | $ 354 | $ 214

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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