Significant Accounting Policies (Schedule Of Depreciation Period Of Property And Equipment) (Details)	12 Months Ended
	Dec. 31, 2017
Maximum [Member] | Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Service lives of assets	39 years
Maximum [Member] | Gaming Equipment [Member]
Property, Plant and Equipment [Line Items]
Service lives of assets	7 years
Maximum [Member] | Furniture And Non-Gaming Equipment [Member]
Property, Plant and Equipment [Line Items]
Service lives of assets	7 years
Minimum [Member] | Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Service lives of assets	5 years
Minimum [Member] | Gaming Equipment [Member]
Property, Plant and Equipment [Line Items]
Service lives of assets	3 years
Minimum [Member] | Furniture And Non-Gaming Equipment [Member]
Property, Plant and Equipment [Line Items]
Service lives of assets	3 years