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Properties And Equipment (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 28, 2019
Mar. 31, 2020
Mar. 31, 2019
Property, Plant and Equipment [Line Items]      
Depreciation expense for operating property   $ 5.2 $ 5.4
Capitalized interest   $ 0.9  
Village East Cinema, Manhattan [Member]      
Property, Plant and Equipment [Line Items]      
Payment to acquire property $ 5.9