Description Of Business And Basis Of Presentation (Impact Of Corrections On Consolidated Financial Statements) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other		$ 2,449	$ 2,811	$ 7,604	$ 9,536
Gross revenue		43,791	36,929	122,531	109,570
Net operating revenue	[1]	41,048	34,526	114,775	102,954
Earnings from operations		4,777	3,835	12,910	12,458
Earnings before income taxes		4,039	3,206	10,867	12,038
Income tax benefit (expense)		3,913	(793)	2,054	(2,559)
Non-controlling interest		7,445		7,445		$ 6,388
Net earnings		7,952	2,413	12,921	9,479
Net earnings attributable to non-controlling interest		(322)	(526)	(1,329)	(3,062)
Net earnings attributable to Century Casinos, Inc. shareholders		7,630	1,887	11,592	$ 6,417
Basic and Diluted					$ 0.26
Foreign currency translation adjustments		2,740	394	7,299	$ 2,813
Other comprehensive income		2,740	394	7,299	2,813
Comprehensive income		10,692	2,807	20,220	12,292
Balance at January 1, 2016		157,798	137,853	157,798	137,853	$ 138,584	$ 126,787
Foreign currency translation adjustments		(238)	(235)	(1,185)	(233)
Comprehensive income attributable to Century Casinos, Inc. shareholders		10,132	2,046	17,706	8,997
Receivables, net				156	(595)
Taxes payable				883	234
Net cash provided by operating activities				14,481	15,586
Effect of Exchange Rate Changes on Cash				1,366	(913)
Non-controlling interest		322	526	1,329	3,062
Adjusted EBITDA		7,547	6,271	20,680	19,439
Canada [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net operating revenue	[1]	15,285	12,005	42,484	38,167
Earnings before income taxes		3,096	2,015	7,971	9,168
Income tax benefit (expense)		(392)	(365)	(1,707)	(1,658)
Net earnings attributable to non-controlling interest		(93)	(183)	(341)	(2,047)
Net earnings attributable to Century Casinos, Inc. shareholders		2,611	1,467	5,923	5,463
Non-controlling interest		93	183	341	2,047
Adjusted EBITDA		4,860	3,379	13,238	12,013
As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other					8,839
Gross revenue					108,873
Net operating revenue					102,257
Earnings from operations					11,761
Earnings before income taxes					11,341
Income tax benefit (expense)					(2,378)
Net earnings					8,963
Net earnings attributable to non-controlling interest					(2,933)
Net earnings attributable to Century Casinos, Inc. shareholders					$ 6,030
Basic and Diluted					$ 0.25
Foreign currency translation adjustments					$ 2,841
Other comprehensive income					2,841
Comprehensive income					11,804
Balance at January 1, 2016							127,275
Foreign currency translation adjustments					(240)
Comprehensive income attributable to Century Casinos, Inc. shareholders					8,631
Receivables, net					64
Taxes payable					63
Net cash provided by operating activities					15,558
Effect of Exchange Rate Changes on Cash					(885)
Non-controlling interest					2,933
As Previously Reported [Member] | Canada [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net operating revenue					37,470
Income tax benefit (expense)					(1,477)
Net earnings attributable to non-controlling interest					(1,918)
Net earnings attributable to Century Casinos, Inc. shareholders					5,076
Non-controlling interest					1,918
Adjusted EBITDA					11,316
Correction [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other					697
Gross revenue					697
Net operating revenue					697
Earnings from operations					697
Earnings before income taxes					697
Income tax benefit (expense)					(181)
Net earnings					516
Net earnings attributable to non-controlling interest					(129)
Net earnings attributable to Century Casinos, Inc. shareholders					$ 387
Basic and Diluted					$ 0.01
Foreign currency translation adjustments					$ (28)
Other comprehensive income					(28)
Comprehensive income					488
Balance at January 1, 2016							(488)
Foreign currency translation adjustments					7
Comprehensive income attributable to Century Casinos, Inc. shareholders					366
Receivables, net					(659)
Taxes payable					171
Net cash provided by operating activities					28
Effect of Exchange Rate Changes on Cash					(28)
Non-controlling interest					129
Correction [Member] | Canada [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net operating revenue					697
Income tax benefit (expense)					(181)
Net earnings attributable to non-controlling interest					(129)
Net earnings attributable to Century Casinos, Inc. shareholders					387
Non-controlling interest					129
Adjusted EBITDA					697
Accumulated Other Comprehensive Income (Loss) [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings				0	0
Foreign currency translation adjustments				6,114	2,580
Balance at January 1, 2016		(6,495)	(10,103)	(6,495)	(10,103)		(12,683)
Accumulated Other Comprehensive Income (Loss) [Member] | As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Foreign currency translation adjustments					2,601
Balance at January 1, 2016							(12,704)
Accumulated Other Comprehensive Income (Loss) [Member] | Correction [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Foreign currency translation adjustments					(21)
Balance at January 1, 2016							21
Retained Earnings [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings				11,592	6,417
Foreign currency translation adjustments				0	0
Balance at January 1, 2016		77,995	63,588	77,995	63,588		57,171
Retained Earnings [Member] | As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings					6,030
Balance at January 1, 2016							57,558
Retained Earnings [Member] | Correction [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings					387
Balance at January 1, 2016							(387)
Total Century Casinos Shareholders' Equity [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings				11,592	6,417
Foreign currency translation adjustments				6,114	2,580
Balance at January 1, 2016		150,353	131,717	150,353	131,717		122,050
Total Century Casinos Shareholders' Equity [Member] | As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings					6,030
Foreign currency translation adjustments					2,601
Balance at January 1, 2016							122,416
Total Century Casinos Shareholders' Equity [Member] | Correction [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings					387
Foreign currency translation adjustments					(21)
Balance at January 1, 2016							(366)
Noncontrolling Interest [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings				1,329	3,062
Foreign currency translation adjustments				1,185	233
Balance at January 1, 2016		$ 7,445	$ 6,136	$ 7,445	6,136		4,737
Noncontrolling Interest [Member] | As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings					2,933
Foreign currency translation adjustments					240
Balance at January 1, 2016							4,859
Noncontrolling Interest [Member] | Correction [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net earnings					129
Foreign currency translation adjustments					$ (7)
Balance at January 1, 2016							$ (122)

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