Segment Information (Segment Information) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020		Sep. 30, 2019		Dec. 31, 2019
Segment Reporting Information [Line Items]
Net operating revenue		$ 95,706		$ 52,935		$ 219,466		$ 150,990
Earnings (loss) before income taxes		4,384		2,180		(51,368)		6,347
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		3,748		482		(54,715)		985
Income taxes (benefit)		428		1,133		3,535		3,219
Depreciation and amortization		6,824		2,829		19,723		7,698
Net earning (loss) attributable to non-controlling interests		208		565		(188)		2,143
Non-cash stock-based compensation						589		979
(Gain) loss on foreign currency transactions, cost recovery income and other		43		(116)		(36)		(886)
Long-lived assets		490,178				490,178				$ 503,933
Cash payments related to lease						4,915		5,185
Impairment - goodwill and intangible assets						35,121
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue		143		1,313		1,286		4,343
Impairment - goodwill and intangible assets						1,000
United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue		62,647		9,199		139,908		26,073
Impairment - goodwill and intangible assets						30,700
Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue		16,577		22,063		37,479		60,353
Impairment - goodwill and intangible assets						3,400
Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue		16,339		20,360		40,793		60,221
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net operating revenue		95,706	[1]	52,935	[2]	219,466	[2]	150,990	[2]
Earnings (loss) before income taxes		4,384		2,180		(51,368)		6,347
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		3,748		482		(54,715)		985
Interest expense (income), net		10,587	[3]	1,416	[4]	32,532	[5]	4,063	[6]
Income taxes (benefit)		428		1,133		3,535		3,219
Depreciation and amortization		6,824		2,829		19,723		7,698
Net earning (loss) attributable to non-controlling interests		208		565		(188)		2,143
Non-cash stock-based compensation		354		358		589		979
(Gain) loss on foreign currency transactions, cost recovery income and other		43		(116)		28,337	[7]	(879)
Loss (gain) on disposition of fixed assets		22		129		(43)		696
Acquisition costs				297		266		1,064
Pre-opening expenses								538
Adjusted EBITDA		22,214		7,093		30,036		20,506
Operating Segments [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue		143	[1]	1,313	[2]	1,286	[2]	4,343	[2]
Earnings (loss) before income taxes		(6,038)		(3,481)		(13,126)		(11,728)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		(5,874)		(3,264)		(13,480)		(10,398)
Interest expense (income), net		3,005	[3]	19	[4]	9,719	[5]	65	[6]
Income taxes (benefit)		(164)		(217)		354		(1,318)
Depreciation and amortization		196		217		463		657
Net earning (loss) attributable to non-controlling interests								(12)
Non-cash stock-based compensation		354		358		589		979
(Gain) loss on foreign currency transactions, cost recovery income and other		69		11		(5,976)	[7]	5
Loss (gain) on disposition of fixed assets				44		2		342
Acquisition costs				297		266		1,064
Adjusted EBITDA		(2,414)		(2,535)		(8,063)		(8,616)
Operating Segments [Member] | United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue		62,647	[1]	9,199	[2]	139,908	[2]	26,073	[2]
Earnings (loss) before income taxes		7,656		1,813		(34,976)		4,793
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		7,656		1,348		(35,999)		3,564
Interest expense (income), net		7,051	[3]			21,286	[5]
Income taxes (benefit)				465		1,023		1,229
Depreciation and amortization		4,506		488		13,008		1,573
(Gain) loss on foreign currency transactions, cost recovery income and other	[7]					30,746
Loss (gain) on disposition of fixed assets		9				9		17
Adjusted EBITDA		19,222		2,301		30,073		6,383
Operating Segments [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue		16,577	[1]	22,063	[2]	37,479	[2]	60,353	[2]
Earnings (loss) before income taxes		2,514		2,169		(1,444)		8,716
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		1,880		1,623		(4,102)		5,704
Interest expense (income), net		525	[3]	1,346	[4]	1,504	[5]	3,856	[6]
Income taxes (benefit)		469		367		2,281		1,913
Depreciation and amortization		1,345		1,327		3,973		3,184
Net earning (loss) attributable to non-controlling interests		165		179		377		1,099
(Gain) loss on foreign currency transactions, cost recovery income and other		30		12		3,476	[7]	(465)
Loss (gain) on disposition of fixed assets		11				(58)		(1)
Pre-opening expenses								538
Adjusted EBITDA		4,425		4,854		7,451		15,828
Operating Segments [Member] | Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue		16,339	[1]	20,360	[2]	40,793	[2]	60,221	[2]
Earnings (loss) before income taxes		252		1,679		(1,822)		4,566
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		86		775		(1,134)		2,115
Interest expense (income), net		6	[3]	51	[4]	23	[5]	142	[6]
Income taxes (benefit)		123		518		(123)		1,395
Depreciation and amortization		777		797		2,279		2,284
Net earning (loss) attributable to non-controlling interests		43		386		(565)		1,056
(Gain) loss on foreign currency transactions, cost recovery income and other		(56)		(139)		91	[7]	(419)
Loss (gain) on disposition of fixed assets		2		85		4		338
Adjusted EBITDA		981		2,473		575		6,911
Master Lease [Member] | United States [Member]
Segment Reporting Information [Line Items]
Interest expense (income), net		7,100				21,300
Cash payments related to lease		6,200				16,700
CDR Land Lease [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Interest expense (income), net		500		500		1,500		1,700
Cash payments related to lease		$ 400		$ 500		$ 1,300		$ 1,500

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

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

[3] Expense of $7.1 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 $0.4 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.

[5] Expense of $21.3 million related to the Master Lease is included in interest expense (income), net in the United States segment. Expense of $1.5 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 $16.7 million and $1.3 million, respectively, for the period presented.

[6] Expense of $1.7 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 $1.5 million for the period presented.

[7] Expense of $30.7 million and $3.4 million is included in the United States and Canada segments, respectively, related to the impairment of goodwill and intangible assets (see Note 5). Expense of $1.0 million is included in the Corporate and Other segment related to the impairment of the MCE investment (see Note 4).