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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%

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