Unaudited Summarized Quarterly Data (Schedule Of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended													12 Months Ended
	Dec. 31, 2019	[1]	Sep. 30, 2019	Jun. 30, 2019	[2]	Mar. 31, 2019	Dec. 31, 2018	[3]	Sep. 30, 2018	[1]	Jun. 30, 2018	[3]	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Unaudited Summarized Quarterly Data [Abstract]
Net operating revenue	$ 67,236		$ 52,935	$ 52,445		$ 45,613	$ 45,106		$ 43,564		$ 39,648		$ 40,620	$ 218,227	$ 168,938	$ 154,069
Earnings (loss) from operations	(14,745)		3,480	2,598		3,446	1,976		3,234		996		3,251	(5,220)	9,459	14,615
Net earnings (loss)	(19,269)		1,047	358		1,723	790		1,795		97		1,319	(16,141)	4,006	7,891
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	$ (20,140)		$ 482	$ (565)		$ 1,068	$ 506		$ 1,640		$ 317		$ 926	$ (19,155)	$ 3,394	$ 6,259
Basic earnings per share:
Earnings (loss) from operations	$ (0.50)		$ 0.12	$ 0.09		$ 0.12	$ 0.07		$ 0.11		$ 0.03		$ 0.11
Net earnings (loss) attributable to Century Casinos Inc. shareholders	(0.68)		0.02	(0.02)		0.04	0.02		0.06		0.01		0.03	$ (0.65)	$ 0.12	$ 0.25
Diluted earnings per share:
Earnings (loss) from operations	(0.50)		0.12	0.09		0.11	0.07		0.11		0.03		0.11
Net earnings (loss) attributable to Century Casinos Inc. shareholders	$ (0.68)		$ 0.02	$ (0.02)		$ 0.04	$ 0.02		$ 0.05		$ 0.01		$ 0.03	$ (0.65)	$ 0.11	$ 0.24

[1] The Company completed the Acquisition in December 2019. See Note 3. In addition, the Company impaired assets related to CCB in December 2019. See Notes 5, 6 and 10.

[2] CMR began operating in April 2019.

[3] CCB began operating in May 2018.