Significant Accounting Policies (Disaggregation Of Company's Revenue From Contracts With Customers) (Details) - USD ($) $ in Thousands		3 Months Ended											12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	[3]	Mar. 31, 2018	Dec. 31, 2017	[4]	Sep. 30, 2017	[5]	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Operating revenue													$ 168,938	$ 164,455	$ 148,177
Less: Promotional allowances	[1],[2]													(10,386)	(8,943)
Net operating revenue		$ 45,106	$ 43,564	$ 39,648		$ 40,620	$ 39,293		$ 41,048		$ 37,330	$ 36,398	168,938	154,069	139,234
Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Less: Promotional allowances	[2]													(37)
Net operating revenue													5,885	4,387	3,972
Canada [Member]
Disaggregation of Revenue [Line Items]
Less: Promotional allowances	[2]													(1,132)	(869)
Net operating revenue													61,361	57,732	50,237
United States [Member]
Disaggregation of Revenue [Line Items]
Less: Promotional allowances	[2]													(7,961)	(7,357)
Net operating revenue													33,483	32,154	30,135
Poland [Member]
Disaggregation of Revenue [Line Items]
Less: Promotional allowances	[2]													(1,256)	(717)
Net operating revenue													68,209	59,796	54,890
Gaming [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													140,301	137,871	123,355
Gaming [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													4,806	3,215	2,157
Gaming [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													40,470	39,866	34,009
Gaming [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													27,736	34,610	32,398
Gaming [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													67,289	60,180	54,791
Hotel [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													1,986	1,943	1,906
Hotel [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													542	554	561
Hotel [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													1,444	1,389	1,345
Food And Beverage [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													15,742	14,513	12,500
Food And Beverage [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													501
Food And Beverage [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													10,528	10,017	8,501
Food And Beverage [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													3,931	3,782	3,397
Food And Beverage [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													782	714	602
Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													10,909	10,128	10,416
Other [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													578	1,209	1,815
Other [Member] | Canada [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													9,821	8,427	8,035
Other [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													372	334	352
Other [Member] | Poland [Member]
Disaggregation of Revenue [Line Items]
Operating revenue													$ 138	$ 158	$ 214

[1] See Note 2, "Significant Accounting Policies," of the consolidated financial statements for a discussion of the impact of the adoption of ASU 2014-09 on the presentation of promotional allowances.

[2] With the adoption of ASU 2014-09, promotional allowances are presented as a reduction in gaming revenue for the year ended December 31, 2018.

[3] CCB began operating in May 2018.

[4] The Company recognized tax expense of $5.4 million related to the Tax Act, increasing net loss and net loss attributable to Century Casinos, Inc. shareholders by the same amount.

[5] The Company released a $5.7 million US valuation allowance on its US deferred tax assets, resulting in a tax benefit and increasing net earnings and net earnings attributable to Century Casinos, Inc. shareholders by the same amount.