Segment Information (Segment Information) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2019		Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018
Segment Reporting Information [Line Items]
Net operating revenue		$ 52,935		$ 43,564		$ 150,990		$ 123,834
Earnings (loss) before income taxes		2,180		2,586		6,347		4,999
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		482		1,640		985		2,887
Income taxes (benefit)		1,133		791		3,219		1,784
Depreciation and amortization		2,829		2,323		7,698		6,645
Net earnings (loss) attributable to non-controlling interests		565		155		2,143		328
Non-cash stock-based compensation						979		613
(Gain) loss on foreign currency transactions, cost recovery income and other		(116)		(182)		(886)		(431)
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue		1,313		1,774		4,343		3,907
Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue		22,063		15,683		60,353		45,690
Income taxes (benefit)						(300)
United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue		9,199		9,360		26,073		25,542
Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue		20,360		16,747		60,221		48,695
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net operating revenue		52,935	[1]	43,564	[2]	150,990	[2]	123,834	[2]
Earnings (loss) before income taxes		2,180		2,586		6,347		4,999
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		482		1,640		985		2,887
Interest expense (income), net		1,416		830		4,063		2,916
Income taxes (benefit)		1,133		791		3,219		1,784
Depreciation and amortization		2,829		2,323		7,698		6,645
Net earnings (loss) attributable to non-controlling interests		565		155		2,143		328
Non-cash stock-based compensation		358		266		979		613
(Gain) loss on foreign currency transactions, cost recovery income and other		(116)		(182)		(879)		(431)
(Gain) loss on disposition of fixed assets		129		172		696		1,035
Acquisition costs		297				1,064
Pre-opening expenses				446		538		1,890
Other one-time income	[3]			(91)				(91)
Adjusted EBITDA		7,093		6,350		20,506		17,576
Operating Segments [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue		1,313	[1]	1,774	[2]	4,343	[2]	3,907	[2]
Earnings (loss) before income taxes		(3,481)		(2,384)		(11,728)		(7,956)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		(3,264)		(1,525)		(10,398)		(6,027)
Interest expense (income), net		19		(66)		65		(50)
Income taxes (benefit)		(217)		(836)		(1,318)		(1,875)
Depreciation and amortization		217		299		657		541
Net earnings (loss) attributable to non-controlling interests				(23)		(12)		(54)
Non-cash stock-based compensation		358		266		979		613
(Gain) loss on foreign currency transactions, cost recovery income and other		11		(72)		5		(1)
(Gain) loss on disposition of fixed assets		44				342		1
Acquisition costs		297				1,064
Pre-opening expenses								350
Other one-time income	[3]			(91)				(91)
Adjusted EBITDA		(2,535)		(2,048)		(8,616)		(6,593)
Operating Segments [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue		22,063	[1]	15,683	[2]	60,353	[2]	45,690	[2]
Earnings (loss) before income taxes		2,169		2,766		8,716		8,288
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		1,623		1,668		5,704		5,641
Interest expense (income), net		1,346		854		3,856		2,812
Income taxes (benefit)		367		880		1,913		2,101
Depreciation and amortization		1,327		762		3,184		2,433
Net earnings (loss) attributable to non-controlling interests		179		218		1,099		546
(Gain) loss on foreign currency transactions, cost recovery income and other		12		(1)		(465)		(140)
(Gain) loss on disposition of fixed assets				3		(1)		6
Pre-opening expenses				446		538		1,135
Adjusted EBITDA		4,854		4,830		15,828		14,534
Operating Segments [Member] | United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue		9,199	[1]	9,360	[2]	26,073	[2]	25,542	[2]
Earnings (loss) before income taxes		1,813		2,121		4,793		4,844
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		1,348		1,578		3,564		3,602
Interest expense (income), net								1
Income taxes (benefit)		465		543		1,229		1,242
Depreciation and amortization		488		545		1,573		1,631
(Gain) loss on disposition of fixed assets						17		1
Adjusted EBITDA		2,301		2,666		6,383		6,477
Operating Segments [Member] | Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue		20,360	[1]	16,747	[2]	60,221	[2]	48,695	[2]
Earnings (loss) before income taxes		1,679		83		4,566		(177)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		775		(81)		2,115		(329)
Interest expense (income), net		51		42		142		153
Income taxes (benefit)		518		204		1,395		316
Depreciation and amortization		797		717		2,284		2,040
Net earnings (loss) attributable to non-controlling interests		386		(40)		1,056		(164)
(Gain) loss on foreign currency transactions, cost recovery income and other		(139)		(109)		(419)		(290)
(Gain) loss on disposition of fixed assets		85		169		338		1,027
Pre-opening expenses								405
Adjusted EBITDA		$ 2,473		$ 902		$ 6,911		$ 3,158

[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] Other one-time income relates to an arbitration award from LOT Polish Airlines in July 2018.