Unaudited Summarized Quarterly Data (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended												12 Months Ended
	Jun. 30, 2015	Dec. 31, 2016	[1]	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	[2]	Dec. 31, 2015	[2]	Sep. 30, 2015	Jun. 30, 2015	[3]	Mar. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Net operating revenue		$ 36,279		$ 34,526	$ 35,201	$ 33,226		$ 31,930		$ 33,526	$ 37,875		$ 30,405	$ 139,234	[4]	$ 133,734	[4]	$ 120,048	[4]
Earnings from operations		3,706		3,835	4,541	4,082		1,775		4,082	7,839		2,100	16,165		15,796		2,657
Net earnings		4,334		2,413	4,326	2,740		738		3,139	7,619		1,497	13,813		12,991		(1,089)
Net earnings attributable to Century Casinos, Inc. shareholders		$ 2,798		$ 1,887	$ 2,249	$ 2,281		$ 352		$ 2,728	$ 6,597		$ 1,845	$ 9,215		$ 11,520		$ 1,232
Basic earnings per share:
Earnings from continuing operations		$ 0.15		$ 0.16	$ 0.18	$ 0.17		$ 0.07		$ 0.17	$ 0.32		$ 0.09
Net earnings attributable to Century Casinos Inc. shareholders		0.12		0.08	0.09	0.09		0.01		0.11	0.27		0.08	$ 0.38		$ 0.47		$ 0.05
Diluted earnings per share:
Earnings from continuing operations		0.15		0.16	0.18	0.17		0.07		0.17	0.32		0.09
Net earnings attributable to Century Casinos Inc. shareholders		$ 0.11		$ 0.08	$ 0.09	$ 0.09		$ 0.01		$ 0.11	$ 0.27		$ 0.08	$ 0.37		$ 0.47		$ 0.05
Termination of Agreements [Member]
Net operating revenue	$ 3,400

[1] In October 2016, operations began at CSA.

[2] The Company has adjusted first quarter 2016 and fourth quarter 2015 for the correction of pari-mutuel revenue discussed in Note 1.

[3] In April 2015, operations began at CDR's casino and racetrack. In June 2015, the Company recorded $3.4 million in net operating revenue and net earnings from the consideration for the early termination of its Oceania and Regent concession agreements.

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