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Description Of Business And Basis Of Presentation (Narrative) (Details) $ in Thousands, $ in Millions			1 Months Ended					3 Months Ended
	May 12, 2020 item	Aug. 05, 2019 USD ($)	Mar. 31, 2020 USD ($) item	Aug. 31, 2019 CAD ($)	May 31, 2019 USD ($)	Sep. 30, 2017 USD ($)	Aug. 31, 2017 item	Mar. 31, 2020 USD ($) item	Mar. 31, 2019 USD ($)	Apr. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jul. 31, 2019	Apr. 30, 2018	Oct. 31, 2014
Description Of Business And Basis Of Presentation [Line Items]
Number of ship-based casinos \| item			5					5
Number of ship-based casinos closed \| item	4
Loss on sale of investment									$ (14)
Net cash outflow during operations fully suspended per month								$ 8,000
Cash and cash equivalents			$ 63,676					63,676	49,533		$ 54,754
Amount needs to reopen operations and cover short-term cash								19,800
Macquarie Capital And UniCredit Bank Austria AG [Member]
Description Of Business And Basis Of Presentation [Line Items]
Revolving credit facility, amount drew			$ 17,400					$ 17,400
Subsequent Event [Member]
Description Of Business And Basis Of Presentation [Line Items]
Cash										$ 50,000
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 casinos owned and operated \| item								8
Hamilton Properties Ltd. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of slot machines \| item							200
Number of table games \| item							17
Number of electronic table games \| item							1
Loan for purchase of equipment						$ 5,000
Mendoza Central Entretenimientos S. A. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Impairment intangible assets			$ 1,000
Wrote-down receivable			$ 300
Century Bets [Member] \| Rocky Mountain Turf Club [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage				25.00%								75.00%
Purchased amount for ownership interest		$ 200		$ 0.2
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%
Golden Hospitality Ltd. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Proceeds from non-interest bearing promissory note					$ 700
Loss on sale of investment								$ (100)
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%
Macquarie Capital [Member] \| Revolving Credit Facility [Member]
Description Of Business And Basis Of Presentation [Line Items]
Amount threshold for demand repayment			$ 3,500					$ 3,500
Revolving credit facility, amount drew			$ 10,000					$ 10,000
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%
Minh Chau Ltd. [Member] \| Golden Hospitality Ltd. [Member] \| Future Invesment [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage													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%
Included In Deposits And Other [Member]
Description Of Business And Basis Of Presentation [Line Items]
Restricted cash			$ 831					$ 831	$ 736
Included In Deposits And Other [Member] \| Century Casino Bath [Member]
Description Of Business And Basis Of Presentation [Line Items]
Restricted cash			600					600
Deposits Related To Payments Of Prizes And Giveaways [Member] \| Casinos Poland [Member]
Description Of Business And Basis Of Presentation [Line Items]
Restricted cash			200					200
Deposits Related To Insurance Policy [Member] \| Maximum [Member]
Description Of Business And Basis Of Presentation [Line Items]
Restricted cash			$ 100					$ 100