Revenue Recognition (Disaggregation Of Company's Revenue From Contracts With Customers) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net operating revenue	$ 72,415	$ 87,656
Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	123	980
United States [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	64,371	53,427
Canada [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	2,011	16,187
Poland [Member]
Disaggregation of Revenue [Line Items]
Net operating revenue	5,910	17,062
Gaming [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	63,428	74,292
Gaming [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		793
Gaming [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	57,909	46,535
Gaming [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		10,210
Gaming [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	5,519	16,754
Pari-Mutuel And Sports Betting [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	2,484	2,352
Pari-Mutuel And Sports Betting [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	931	277
Pari-Mutuel And Sports Betting [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,553	2,075
Hotel [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,750	1,816
Hotel [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,750	1,733
Hotel [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		83
Food And Beverage [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	2,720	6,552
Food And Beverage [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		105
Food And Beverage [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	2,684	3,753
Food And Beverage [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	36	2,501
Food And Beverage [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Operating revenue		193
Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	2,033	2,644
Other [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	123	82
Other [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	1,097	1,129
Other [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	422	1,318
Other [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	$ 391	$ 115