Segment And Geographic Information (Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended											12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	[1]	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	[3]	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Net operating revenue	$ 45,106	$ 43,564	$ 39,648		$ 40,620	$ 39,293	[2]	$ 41,048		$ 37,330	$ 36,398	$ 168,938		$ 154,069		$ 139,234
Earnings before income taxes												5,923		12,451		15,600
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	506	$ 1,640	$ 317		$ 926	(5,334)	[2]	$ 7,630		$ 1,802	$ 2,159	3,394		6,259		9,215
Income taxes (benefit)												1,917		4,560		1,787
Depreciation and amortization												9,399		8,945		8,349
Net earnings (loss) attributable to non-controlling interests												612		1,632		4,598
Non-cash stock-based compensation												868		669		759
(Gain) loss on foreign currency transactions, cost recovery income and other												(578)		(1,405)		(2,523)
Long-lived assets	187,017					152,778						187,017		152,778
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue												5,885		4,387		3,972
Corporate And Other [Member] | Century Casino Bath [Member]
Segment Reporting Information [Line Items]
Capital expenditures														1,500
Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue												61,361		57,732		50,237
Canada [Member] | Century Mile [Member]
Segment Reporting Information [Line Items]
Capital expenditures												40,000		4,600
United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue												33,483		32,154		30,135
Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue												68,209		59,796		54,890
Century Casino St. Albert [Member]
Segment Reporting Information [Line Items]
Capital expenditures																9,500
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net operating revenue												168,938	[4]	154,069	[5]	139,234	[5]
Earnings before income taxes												5,923		12,451		15,600
Net earnings (loss) attributable to Century Casinos, Inc. shareholders												3,394		6,259		9,215
Interest expense (income), net												4,114		3,569		3,088
Income taxes (benefit)												1,917		4,560		1,787
Depreciation and amortization												9,399		8,945		8,349
Net earnings (loss) attributable to non-controlling interests												612		1,632		4,598
Non-cash stock-based compensation												868		669		759
(Gain) loss on foreign currency transactions, cost recovery income and other												(661)		(1,362)		(2,523)
Loss on disposition of fixed assets												1,090		622		330
Acquisition costs														355		159
Pre-opening expenses												2,644		837
Adjusted EBITDA												23,377		26,086		25,762
Long-lived assets	187,017					152,778						187,017		152,778		140,763
Capital expenditures												56,774	[6]	11,127	[7]	16,646	[8]
Operating Segments [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net operating revenue												5,885	[4]	4,387	[5]	3,972	[5]
Earnings before income taxes												(11,298)		(8,135)		(7,133)
Net earnings (loss) attributable to Century Casinos, Inc. shareholders												(8,541)		(6,171)		(5,044)
Interest expense (income), net												12		(25)		(22)
Income taxes (benefit)												(2,722)		(1,964)		(2,089)
Depreciation and amortization												945		366		382
Net earnings (loss) attributable to non-controlling interests												(35)
Non-cash stock-based compensation												868		669		759
(Gain) loss on foreign currency transactions, cost recovery income and other												2		24		19
Loss on disposition of fixed assets												25		3
Acquisition costs														327		159
Pre-opening expenses												350		275
Adjusted EBITDA												(9,096)		(6,496)		(5,836)
Long-lived assets	10,310					4,502						10,310		4,502		1,994
Capital expenditures												8,428	[6]	1,793	[7]	611	[8]
Operating Segments [Member] | Canada [Member]
Segment Reporting Information [Line Items]
Net operating revenue												61,361	[4]	57,732	[5]	50,237	[5]
Earnings before income taxes												10,973		11,685		12,381
Net earnings (loss) attributable to Century Casinos, Inc. shareholders												7,715		7,681		8,448
Interest expense (income), net												3,895		3,487		3,037
Income taxes (benefit)												2,536		3,008		796
Depreciation and amortization												3,211		3,427		3,049
Net earnings (loss) attributable to non-controlling interests												722		996		3,137
(Gain) loss on foreign currency transactions, cost recovery income and other												(235)		(564)		(2,232)
Loss on disposition of fixed assets												10		83		27
Acquisition costs														28
Pre-opening expenses												1,668		25
Adjusted EBITDA												19,522		18,171		16,262
Long-lived assets	115,861					86,361						115,861		86,361		77,015
Capital expenditures												42,029	[6]	6,476	[7]	13,536	[8]
Operating Segments [Member] | United States [Member]
Segment Reporting Information [Line Items]
Net operating revenue												33,483	[4]	32,154	[5]	30,135	[5]
Earnings before income taxes												5,881		5,597		4,705
Net earnings (loss) attributable to Century Casinos, Inc. shareholders												4,373		3,469		2,890
Interest expense (income), net												1		2		2
Income taxes (benefit)												1,508		2,128		1,815
Depreciation and amortization												2,178		2,405		2,488
Loss on disposition of fixed assets												1		1		2
Adjusted EBITDA												8,061		8,005		7,197
Long-lived assets	48,381					49,403						48,381		49,403		51,142
Capital expenditures												1,183	[6]	672	[7]	1,165	[8]
Operating Segments [Member] | Poland [Member]
Segment Reporting Information [Line Items]
Net operating revenue												68,209	[4]	59,796	[5]	54,890	[5]
Earnings before income taxes												367		3,304		5,647
Net earnings (loss) attributable to Century Casinos, Inc. shareholders												(153)		1,280		2,921
Interest expense (income), net												206		105		71
Income taxes (benefit)												595		1,388		1,265
Depreciation and amortization												3,065		2,747		2,430
Net earnings (loss) attributable to non-controlling interests												(75)		636		1,461
(Gain) loss on foreign currency transactions, cost recovery income and other												(428)		(822)		(310)
Loss on disposition of fixed assets												1,054		535		301
Pre-opening expenses												626		537
Adjusted EBITDA												4,890		6,406		8,139
Long-lived assets	$ 12,465					$ 12,512						12,465		12,512		10,612
Capital expenditures												$ 5,134	[6]	$ 2,186	[7]	$ 1,334	[8]

[1] CCB began operating in May 2018.

[2] 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.

[3] 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.

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

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

[6] Capital expenditures in 2018 included construction costs of $40.0 million related to Century Mile in the Canada segment.

[7] Capital expenditures in 2017 included purchases of property and equipment of $4.6 million related to Century Mile in the Canada segment and $1.5 million related to CCB in the Corporate and Other segment.

[8] Capital expenditures for Canada in 2016 included purchases of property and equipment of $9.5 million related to the acquisition of Century Casino St. Albert.