Condensed Consolidated Statements Of Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total Century Casinos Shareholders' Equity [Member]	Noncontrolling Interests [Member]	Total
BALANCE at Dec. 31, 2016	$ 245	$ 78,174	$ (12,609)	$ 66,386	$ 132,196	$ 6,388	$ 138,584
Shares, BALANCE at Dec. 31, 2016	24,451,582
Net earnings				3,962	3,962	1,008	4,970
Foreign currency translation adjustment			3,613		3,613	947	4,560
Amortization of stock-based compensation		235			235	0	235
Distribution to non-controlling interest						(58)	(58)
Exercise of stock options		32			32	0	32
Exercise of stock options, shares	17,036
BALANCE at Jun. 30, 2017	$ 245	78,424	(8,996)	70,365	140,038	8,285	148,323
Shares, BALANCE at Jun. 30, 2017	24,468,618
Cumulative effect of accounting change		(17)		17		0
BALANCE at Dec. 31, 2017	$ 294	113,068	(6,127)	72,662	179,897	7,421	$ 187,318
Shares, BALANCE at Dec. 31, 2017	29,359,820						29,359,820
Net earnings				1,244	1,244	174	$ 1,418
Foreign currency translation adjustment			(4,700)		(4,700)	(645)	(5,345)
Amortization of stock-based compensation		347			347		347
Distribution to non-controlling interest						(30)	(30)
Fair value of non-controlling interest						445	445
Incremental direct costs of common stock issuance		(59)			(59)		(59)
Exercise of stock options		155			155		155
Exercise of stock options, shares	39,198
BALANCE at Jun. 30, 2018	$ 294	$ 113,511	$ (10,827)	$ 73,906	$ 176,884	$ 7,365	$ 184,249
Shares, BALANCE at Jun. 30, 2018	29,399,018						29,399,018