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Goodwill And Intangible Assets (Summary Of Intangible Assets Other Than Goodwill) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | $ 37,797 | $ 37,253
Less: Accumulated amortization | (30,428) | (28,711)
Net intangible assets other than goodwill | 7,369 | 8,542
Beneficial Leases [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 28,592 | 28,860
Less: Accumulated amortization | (24,145) | (23,292)
Net intangible assets other than goodwill | 4,447 | 5,568
Trade Name [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 7,254 | 7,254
Less: Accumulated amortization | (5,207) | (4,936)
Net intangible assets other than goodwill | 2,047 | 2,318
Other Intangible Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 1,951 | 1,139
Less: Accumulated amortization | (1,076) | (483)
Net intangible assets other than goodwill | $ 875 | $ 656

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