Segment Information (Segment Information) (Details) $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended
		Jun. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) item	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) item	Sep. 30, 2015 USD ($)
Segment Reporting Information [Line Items]
Net operating revenue	[1]		$ 34,526	$ 33,526	$ 102,257	$ 101,803
Net earnings (loss) attributable to Century Casinos, Inc. shareholders			1,887	2,728	6,030	11,170
Interest expense (income), net			649	810	2,198	2,506
Income taxes (benefit)			793	373	2,378	402
Depreciation and amortization			2,133	2,078	6,260	5,780
Non-controlling interests			526	411	2,933	1,085
Non-cash stock-based compensation			192	423	573	1,230
(Gain) loss on foreign currency transactions and other			(20)	(240)	(1,778)	(1,142)
Loss on disposition of fixed assets		$ (600)	5	136	42	281
Acquisition costs			106		106
Preopening expenses						345
Other one-time income	[2]					(3,365)
Adjusted EBITDA			$ 6,271	6,719	$ 18,742	18,292
Number of Co-CEOs | item			2		2
Number of reportable segments | item					3
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]		$ 977	921	$ 2,627	7,034
Net earnings (loss) attributable to Century Casinos, Inc. shareholders			(1,264)	(696)	(3,453)	806
Interest expense (income), net			(5)	(4)	(13)	(10)
Income taxes (benefit)			(505)	(944)	(1,495)	(3,121)
Depreciation and amortization			105	118	276	316
Non-controlling interests			0	0	0	0
Non-cash stock-based compensation			192	423	573	1,230
(Gain) loss on foreign currency transactions and other			3	6	12	(6)
Loss on disposition of fixed assets			0	3	0	4
Acquisition costs			106		106
Preopening expenses						0
Other one-time income	[2]					(3,365)
Adjusted EBITDA			(1,368)	(1,094)	(3,994)	(4,146)
Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]		12,005	12,198	37,470	33,951
Net earnings (loss) attributable to Century Casinos, Inc. shareholders			1,467	1,957	5,076	6,355
Interest expense (income), net			655	783	2,189	2,406
Income taxes (benefit)			365	519	1,477	1,479
Depreciation and amortization			775	644	2,246	1,635
Non-controlling interests			183	145	1,918	143
Non-cash stock-based compensation			0	0	0	0
(Gain) loss on foreign currency transactions and other			(71)	(148)	(1,616)	(670)
Loss on disposition of fixed assets			5	2	26	4
Acquisition costs			0		0
Preopening expenses						345
Other one-time income	[2]					0
Adjusted EBITDA			3,379	3,902	11,316	11,697
United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]		8,188	7,958	22,970	21,960
Net earnings (loss) attributable to Century Casinos, Inc. shareholders			1,000	931	2,378	2,125
Interest expense (income), net			0	0	0	0
Income taxes (benefit)			614	571	1,460	1,301
Depreciation and amortization			624	638	1,875	1,904
Non-controlling interests			0	0	0	0
Non-cash stock-based compensation			0	0	0	0
(Gain) loss on foreign currency transactions and other			0	0	0	0
Loss on disposition of fixed assets			0	0	3	0
Acquisition costs			0		0
Preopening expenses						0
Other one-time income	[2]					0
Adjusted EBITDA			2,238	2,140	5,716	5,330
Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue	[1]		13,356	12,449	39,190	38,858
Net earnings (loss) attributable to Century Casinos, Inc. shareholders			684	536	2,029	1,884
Interest expense (income), net			(1)	31	22	110
Income taxes (benefit)			319	227	936	743
Depreciation and amortization			629	678	1,863	1,925
Non-controlling interests			343	266	1,015	942
Non-cash stock-based compensation			0	0	0	0
(Gain) loss on foreign currency transactions and other			48	(98)	(174)	(466)
Loss on disposition of fixed assets			0	131	13	273
Acquisition costs			0		0
Preopening expenses						0
Other one-time income	[2]					0
Adjusted EBITDA			$ 2,022	$ 1,771	$ 5,704	5,411
Termination of Agreements [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Other one-time income						$ 3,400

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

[2] Other one-time income for Corporate and Other relates to the $3.4 million consideration for the Termination Agreement with Norwegian