Segment Information (Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net operating revenue	$ 72,415	$ 87,656
Earnings (loss) before income taxes	(1,804)	(43,137)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	(1,419)	(45,856)
Income taxes (benefit)	99	2,524
Depreciation and amortization	6,643	6,495
Net earning (loss) attributable to non-controlling interests	(484)	195
Non-cash stock-based compensation	259	(14)
(Gain) loss on foreign currency transactions, cost recovery income and other	(470)	(1)
Impairment - intangible and tangible assets		33,964
Total assets	673,805		$ 680,760
Cash payments related to lease	1,581	1,822
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue	123	980
Corporate And Other [Member] | Mendoza Central Entretenimientos S. A. [Member]
Segment Reporting Information [Line Items]
Impairment - intangible and tangible assets		1,000
United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue	64,371	53,427
Impairment - intangible and tangible assets		29,600
Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue	2,011	16,187
Impairment - intangible and tangible assets		3,400
Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue	5,910	17,062
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net operating revenue	72,415	87,656
Earnings (loss) before income taxes	(1,804)	(43,137)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	(1,419)	(45,856)
Interest expense (income), net	10,522	11,366
Income taxes (benefit)	99	2,524
Depreciation and amortization	6,643	6,495
Net earning (loss) attributable to non-controlling interests	(484)	195
Non-cash stock-based compensation	259	(14)
(Gain) loss on foreign currency transactions, cost recovery income and other	(981)	753
Impairment - intangible and tangible assets		33,964
Loss on disposition of fixed assets	105	4
Acquisition costs		213
Adjusted EBITDA	14,744	9,644
Operating Segments [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue	123	980
Earnings (loss) before income taxes	(5,552)	(8,699)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	(6,666)	(7,260)
Interest expense (income), net	3,276	3,511
Income taxes (benefit)	1,114	(1,439)
Depreciation and amortization	103	136
Non-cash stock-based compensation	259	(14)
(Gain) loss on foreign currency transactions, cost recovery income and other	(417)	645
Impairment - intangible and tangible assets		1,000
Loss on disposition of fixed assets		2
Acquisition costs		213
Adjusted EBITDA	(2,331)	(3,206)
Operating Segments [Member] | United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue	64,371	53,427
Earnings (loss) before income taxes	10,594	(32,372)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	10,594	(34,219)
Interest expense (income), net	6,935	7,281
Income taxes (benefit)		1,847
Depreciation and amortization	4,525	4,259
Impairment - intangible and tangible assets		29,589
Loss on disposition of fixed assets	73
Adjusted EBITDA	22,127	8,757
Operating Segments [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue	2,011	16,187
Earnings (loss) before income taxes	(3,489)	(2,157)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	(3,512)	(4,408)
Interest expense (income), net	307	543
Income taxes (benefit)	(409)	2,071
Depreciation and amortization	1,222	1,337
Net earning (loss) attributable to non-controlling interests	432	180
(Gain) loss on foreign currency transactions, cost recovery income and other	(557)	(64)
Impairment - intangible and tangible assets		3,375
Loss on disposition of fixed assets	32
Adjusted EBITDA	(2,485)	3,034
Operating Segments [Member] | Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue	5,910	17,062
Earnings (loss) before income taxes	(3,357)	91
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	(1,835)	31
Interest expense (income), net	4	31
Income taxes (benefit)	(606)	45
Depreciation and amortization	793	763
Net earning (loss) attributable to non-controlling interests	(916)	15
(Gain) loss on foreign currency transactions, cost recovery income and other	(7)	172
Loss on disposition of fixed assets		2
Adjusted EBITDA	(2,567)	1,059
Master Lease [Member] | United States [Member]
Segment Reporting Information [Line Items]
Interest expense (income), net	6,900	7,300
Cash payments related to lease	4,200	6,200
CDR Land Lease [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Interest expense (income), net	400	500
Cash payments related to lease	$ 300	$ 500