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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 |

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