Acquisitions (Narrative) (Details) $ in Thousands			3 Months Ended		9 Months Ended
	May 22, 2020 USD ($)	Dec. 06, 2019 USD ($) item	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Net (loss) earnings attributable to Century Casinos, Inc. shareholders			$ 3,748	$ 482	$ (54,715)	$ 985
Goodwill			10,442		$ 10,442		$ 32,936
Player Loyalty Programs [Member]
Business Acquisition [Line Items]
Useful life					7 years
Acquired Casinos [Member]
Business Acquisition [Line Items]
Total consideration		$ 389,600
Initial payment		110,600
Base price		107,200
Working capital	$ 1,200
Business combination, acquired assets		379,800
Business combination, cash and restricted cash		13,900
Business combination, liabilities		287,900
Goodwill		19,786
Payments to Acquire Businesses, Net of Cash Acquired					$ 97,786
Fair value of the acquired real estate assets		277,800
Acquisition costs					300	$ 1,100
Acquisition-related contingencies			1,000		1,000		1,000
Macquarie Capital [Member] | Credit Agreement [Member]
Business Acquisition [Line Items]
Credit facility amount		180,000
VICI [Member] | Master Lease [Member]
Business Acquisition [Line Items]
Initial annual rent		$ 25,000
Initial lease term		15 years
Number of renewal options | item		4
Lease renewal term		5 years
Century Casino Cape Girardeau [Member] | Acquired Casinos [Member]
Business Acquisition [Line Items]
Operating revenue					34,500
Net (loss) earnings attributable to Century Casinos, Inc. shareholders					(24,600)
Century Casino Caruthersville [Member] | Acquired Casinos [Member]
Business Acquisition [Line Items]
Operating revenue					20,700
Net (loss) earnings attributable to Century Casinos, Inc. shareholders					$ (9,600)
Mountaineer Casino [Member] | Trademarks [Member]
Business Acquisition [Line Items]
Useful life					10 years
Mountaineer Casino [Member] | Acquired Casinos [Member]
Business Acquisition [Line Items]
Operating revenue					$ 65,700
Net (loss) earnings attributable to Century Casinos, Inc. shareholders					$ (5,600)
Mountaineer Casino [Member] | Acquired Casinos [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Useful life					10 years
United States [Member]
Business Acquisition [Line Items]
Goodwill							$ 18,629
United States [Member] | Acquired Casinos [Member]
Business Acquisition [Line Items]
Ancillary agreement fees					200
Corporate And Other [Member] | Acquired Casinos [Member]
Business Acquisition [Line Items]
Ancillary agreement fees					$ 400