Description Of Business And Basis Of Presentation (Narrative) (Details) $ in Millions, $ in Millions	1 Months Ended		3 Months Ended
	Sep. 30, 2017 USD ($)	Aug. 31, 2017 item	Mar. 31, 2019 CAD ($) item	Mar. 31, 2019 USD ($) item	Apr. 30, 2018	Oct. 31, 2014
Description Of Business And Basis Of Presentation [Line Items]
Number of ship-based casinos			9	9
Number of cruise ship owners			3
Golden Hospitality Ltd. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership interest			49.00%	49.00%
Lot Polish Airlines Invesment [Member] | Polish Airports Company [Member]
Description Of Business And Basis Of Presentation [Line Items]
Owned by noncontrolling interest			33.30%	33.30%
Casinos Poland [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			66.60%	66.60%
Number of casino licenses operating			7
Century Bets! Inc. [Member] | Rocky Mountain Turf Club [Member]
Description Of Business And Basis Of Presentation [Line Items]
Owned by noncontrolling interest			25.00%	25.00%
Hamilton Properties Ltd. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of slot machines		200
Number of table games		17
Number of electronic table games		1
Loan for purchase of equipment | $	$ 5.0
Century Mile [Member] | Multi-Level REC [Member]
Description Of Business And Basis Of Presentation [Line Items]
Project cost			$ 61.5	$ 46.0
Century Resorts Management GmbH [Member] | Mendoza Central Entretenimientos S. A. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership interest			7.50%	7.50%		7.50%
Century Resorts Management GmbH [Member] | Percentage Of Century Downs Racetrack Owned By Century Casinos Europe [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			75.00%	75.00%
Century Resorts Management GmbH [Member] | Century Bets! Inc. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			75.00%	75.00%
Golden Hospitality Ltd. [Member] | Century Resorts Management [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			51.00%	51.00%	51.00%
Century Downs Racetrack And Casino [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			75.00%	75.00%
Century Downs Racetrack And Casino [Member] | Unaffiliated Shareholders [Member]
Description Of Business And Basis Of Presentation [Line Items]
Owned by noncontrolling interest			25.00%	25.00%
Minh Chau Ltd. [Member] | Golden Hospitality Ltd. [Member] | Golden Hospitality Ltd. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			9.21%	9.21%
Minh Chau Ltd. [Member] | Golden Hospitality Ltd. [Member] | Future Invesment [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			51.00%	51.00%
Minh Chau Ltd. [Member] | Golden Hospitality Ltd. [Member] | Option to Purchase [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage			70.00%	70.00%