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Supplemental Financial Information (Schedule Of Leasehold Improvements, Property And Equipment) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Supplemental Financial Information [Abstract]    
Land $ 11,062us-gaap_Land $ 11,062us-gaap_Land
Leasehold improvements and buildings 1,267,108us-gaap_BuildingsAndImprovementsGross 1,121,260us-gaap_BuildingsAndImprovementsGross
Furniture and fixtures 127,260us-gaap_FurnitureAndFixturesGross 113,751us-gaap_FurnitureAndFixturesGross
Equipment 315,230us-gaap_FixturesAndEquipmentGross 244,562us-gaap_FixturesAndEquipmentGross
Leasehold improvements, property and equipment, gross 1,720,660us-gaap_PropertyPlantAndEquipmentGross 1,490,635us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation (613,676)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (527,397)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Leasehold improvements, property and equipment, net $ 1,106,984us-gaap_PropertyPlantAndEquipmentNet $ 963,238us-gaap_PropertyPlantAndEquipmentNet