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Property And Equipment (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 22,900 $ 10,100 $ 9,000
Impairment - intangible and tangible assets 35,121 16,486  
Assets held for sale 8,271    
Land [Member] | Canada [Member]      
Property, Plant and Equipment [Line Items]      
Assets held for sale 4,700    
Buildings And Improvements [Member] | Canada [Member]      
Property, Plant and Equipment [Line Items]      
Assets held for sale 3,500    
Corporate And Other [Member]      
Property, Plant and Equipment [Line Items]      
Impairment - intangible and tangible assets $ 0   $ 0
Corporate And Other [Member] | Century Casino Bath [Member]      
Property, Plant and Equipment [Line Items]      
Impairment - intangible and tangible assets   $ 8,000