Segment Information (Segment Information) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020		Mar. 31, 2019		Dec. 31, 2019
Segment Reporting Information [Line Items]
Net operating revenue		$ 87,656		$ 45,613
(Loss) earnings before income taxes		(43,137)		2,439
Net (loss) earnings attributable to Century Casinos, Inc. shareholders		(45,856)		1,068
Income taxes (benefit)		2,524		716
Depreciation and amortization		6,495		2,425
Net earnings (loss) attributable to non-controlling interests		195		655
Non-cash stock-based compensation		(14)		261
(Gain) loss on foreign currency transactions, cost recovery income and other		(1)		(247)
Long-lived assets		490,307				$ 503,933
Cash payments related to lease		1,822		1,108
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue		980		1,496
United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue		53,427		8,068
Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue		16,187		16,297
Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue		17,062		19,752
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net operating revenue		87,656	[1]	45,613	[2]
(Loss) earnings before income taxes		(43,137)		2,439
Net (loss) earnings attributable to Century Casinos, Inc. shareholders		(45,856)		1,068
Interest expense (income), net		11,366	[3]	1,254	[4]
Income taxes (benefit)		2,524		716
Depreciation and amortization		6,495		2,425
Net earnings (loss) attributable to non-controlling interests		195		655
Non-cash stock-based compensation		(14)		261
(Gain) loss on foreign currency transactions, cost recovery income and other		34,717		(258)
Loss on disposition of fixed assets		4		44
Acquisition costs		213
Pre-opening expenses				538
Adjusted EBITDA		9,644		6,703
Operating Segments [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue		980	[1]	1,496	[2]
(Loss) earnings before income taxes		(8,699)		(3,284)
Net (loss) earnings attributable to Century Casinos, Inc. shareholders		(7,260)		(2,375)
Interest expense (income), net		3,511	[3]	16	[4]
Income taxes (benefit)		(1,439)		(867)
Depreciation and amortization		136		298
Net earnings (loss) attributable to non-controlling interests				(42)
Non-cash stock-based compensation		(14)		261
(Gain) loss on foreign currency transactions, cost recovery income and other		1,645		(11)
Loss on disposition of fixed assets		2		28
Acquisition costs		213
Adjusted EBITDA		(3,206)		(2,692)
Operating Segments [Member] | United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue		53,427	[1]	8,068	[2]
(Loss) earnings before income taxes		(32,372)		1,339
Net (loss) earnings attributable to Century Casinos, Inc. shareholders		(34,219)		983
Interest expense (income), net	[3]	7,281
Income taxes (benefit)		1,847		356
Depreciation and amortization		4,259		560
(Gain) loss on foreign currency transactions, cost recovery income and other		29,589
Loss on disposition of fixed assets				16
Adjusted EBITDA		8,757		1,915
Operating Segments [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue		16,187	[1]	16,297	[2]
(Loss) earnings before income taxes		(2,157)		2,553
Net (loss) earnings attributable to Century Casinos, Inc. shareholders		(4,408)		1,547
Interest expense (income), net		543	[3]	1,192	[4]
Income taxes (benefit)		2,071		766
Depreciation and amortization		1,337		797
Net earnings (loss) attributable to non-controlling interests		180		240
(Gain) loss on foreign currency transactions, cost recovery income and other		3,311		(45)
Loss on disposition of fixed assets				(5)
Pre-opening expenses				538
Adjusted EBITDA		3,034		5,030
Operating Segments [Member] | Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue		17,062	[1]	19,752	[2]
(Loss) earnings before income taxes		91		1,831
Net (loss) earnings attributable to Century Casinos, Inc. shareholders		31		913
Interest expense (income), net		31	[3]	46	[4]
Income taxes (benefit)		45		461
Depreciation and amortization		763		770
Net earnings (loss) attributable to non-controlling interests		15		457
(Gain) loss on foreign currency transactions, cost recovery income and other		172		(202)
Loss on disposition of fixed assets		2		5
Adjusted EBITDA		1,059		2,450
Master Lease [Member] | United States [Member]
Segment Reporting Information [Line Items]
Interest expense (income), net		7,300
Cash payments related to lease		6,200
CDR Land Lease [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Interest expense (income), net		500		500
Cash payments related to lease		$ 500		$ 500

[1] Net operating revenue for Corporate and Other primarily relates to CCB and the Company’s cruise ship operations.

[2] Net operating revenue for Corporate and Other primarily relates to the Company’s cruise ship operations.

[3] Expense of $7.3 million related to the Master Lease is included in interest expense (income), net in the United States segment. Expense of $0.5 million related to the CDR land lease is included in interest expense (income), net in the Canada segment. Cash payments related to the Master Lease and CDR land lease were $6.2 million and $0.5 million, respectively, for the period presented.

[4] Expense of $0.5 million related to the CDR land lease is included in interest expense (income), net in the Canada segment. Cash payments related to the CDR land lease were $0.5 million for the period presented.