Segment Information (Segment Information) (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2017 USD ($) item	Mar. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Net operating revenue	[1]	$ 36,398	$ 33,227
Earnings (loss) before income taxes		3,792	3,519
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		2,159	2,281
Interest expense (income), net		901	761
Income taxes (benefit)		995	779
Depreciation and amortization		2,085	2,010
Non-controlling interests		638	459
Non-cash stock-based compensation		103	190
Loss (gain) on foreign currency transactions and cost recovery income		(203)	(198)
Loss on disposition of fixed assets		5	26
Acquisition costs		28
Adjusted EBITDA		$ 6,711	6,308
Number of Co-CEOs | item		2
Number of reportable segments | item		3
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]	$ 1,192	888
Earnings (loss) before income taxes		(1,516)	(1,408)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		(1,108)	(963)
Interest expense (income), net		(4)	(3)
Income taxes (benefit)		(408)	(446)
Depreciation and amortization		98	85
Non-controlling interests		0	0
Non-cash stock-based compensation		103	190
Loss (gain) on foreign currency transactions and cost recovery income		(1)	22
Loss on disposition of fixed assets		3	0
Acquisition costs		0
Adjusted EBITDA		(1,317)	(1,115)
Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]	13,160	12,995
Earnings (loss) before income taxes		2,113	2,786
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		1,470	2,035
Interest expense (income), net		917	749
Income taxes (benefit)		547	625
Depreciation and amortization		805	697
Non-controlling interests		96	127
Non-cash stock-based compensation		0	0
Loss (gain) on foreign currency transactions and cost recovery income		17	(20)
Loss on disposition of fixed assets		2	2
Acquisition costs		28
Adjusted EBITDA		3,882	4,215
United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]	7,500	7,080
Earnings (loss) before income taxes		1,158	876
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		716	543
Interest expense (income), net		0	0
Income taxes (benefit)		442	333
Depreciation and amortization		610	626
Non-controlling interests		0	0
Non-cash stock-based compensation		0	0
Loss (gain) on foreign currency transactions and cost recovery income		0	0
Loss on disposition of fixed assets		0	2
Acquisition costs		0
Adjusted EBITDA		1,768	1,504
Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]	14,546	12,264
Earnings (loss) before income taxes		2,037	1,265
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		1,081	666
Interest expense (income), net		(12)	15
Income taxes (benefit)		414	267
Depreciation and amortization		572	602
Non-controlling interests		542	332
Non-cash stock-based compensation		0	0
Loss (gain) on foreign currency transactions and cost recovery income		(219)	(200)
Loss on disposition of fixed assets		0	22
Acquisition costs		0
Adjusted EBITDA		2,378	$ 1,704
Apex Acquisition[Member]
Segment Reporting Information [Line Items]
Net operating revenue		2,000
Net earnings (loss) attributable to Century Casinos, Inc. shareholders		$ 100

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