Description Of Business And Basis Of Presentation (Narrative) (Details) CAD in Millions			1 Months Ended			12 Months Ended
	Mar. 20, 2015 CAD	Mar. 20, 2015 USD ($)	Aug. 31, 2017 item	Jun. 30, 2017 ft² item	Jun. 30, 2015 USD ($)	Dec. 31, 2017 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 31, 2014
Description Of Business And Basis Of Presentation [Line Items]
Number of ship-based casinos						14
Number of cruise lines						4
Adjusted EBITDA | $						$ 26,086,000	$ 25,762,000	$ 22,798,000
Lot Polish Airlines Invesment [Member]
Description Of Business And Basis Of Presentation [Line Items]
Owned by noncontrolling interest						33.30%	33.30%
Casinos Poland Ltd [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of casinos owned and operated						6
Century Bets! Inc. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage						75.00%
Owned by noncontrolling interest						25.00%
Casinos Poland Ltd [Member] | Lot Polish Airlines Invesment [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage						66.60%
Century Casinos Europe GmbH [Member] | Saw Close Casino Ltd. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of slot machines				35
Number of table games				18
Number of automated live table games				24
Square footage of casino facility | ft²				15,000
Century Casinos Europe GmbH [Member] | Hamilton Properties Ltd. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of slot machines			200
Number of table games			17
Potential loan for purchase of equipment | $						$ 5,000,000
Century Casinos Europe GmbH [Member] | Hamilton Properties Ltd. [Member] | Minimum [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of electronic table games			1
Oceania Cruises [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of ships for which concession agreements will be terminated						8
Term of consulting agreement						2 years
Assets held for sale | $					$ 600,000
Consideration to be received in relation to early termination of concession agreements | $					$ 4,000,000
Consulting Fee | $						$ 2,000,000
Consulting Fee payable per quarter | $						$ 250,000
TUI Cruises, Mein Schiff 6 [Member]
Description Of Business And Basis Of Presentation [Line Items]
Number of passengers						2,500
Century Downs Racetrack And Casino [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership percentage						75.00%
Owned by noncontrolling interest						25.00%
Century Downs Racetrack And Casino [Member] | Century Casinos Europe GmbH [Member]
Description Of Business And Basis Of Presentation [Line Items]
Additional ownership acquired	60.00%	60.00%
Amount of credit agreement converted | CAD	CAD 11.0
Gain on conversion of debt receivable to equity recognized in accumulated other comprehensive income | $		$ 100,000
Gain on conversion of debt receivable to equity | $		$ 600,000
Century Downs Racetrack And Casino [Member] | BMO Credit Agreement [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership interest						75.00%
Mendoza Central Entretenimientos S. A. [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership interest						7.50%
Mendoza Central Entretenimientos S. A. [Member] | Century Casinos Europe GmbH [Member]
Description Of Business And Basis Of Presentation [Line Items]
Ownership interest									7.50%