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Description Of Business And Basis Of Presentation (Narrative) (Details) $ in Millions |  |  | 6 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
May 04, 2018 CAD ($) | May 04, 2018 USD ($) | Apr. 25, 2018 USD ($) | Jun. 30, 2018 USD ($) item ft | May 31, 2017 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2013
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Number or awarded casino licenses | item |  |  |  | 7 |  |  |
Number of ship-based casinos | item |  |  |  | 13 |  |  |
Number of cruise ship owners | item |  |  |  | 4 |  |  |
Equity investment |  |  |  | $ 444,000 |  |  |
Payments for acquisition |  |  |  | 200,000 |  |  |
Value of agreement recorded in deposits and other |  |  |  | $ 3,171,000 |  | $ 3,169,000 |
Number of casino licenses operating | item |  |  |  | 5 |  |  |
Percentage Of CBS Owned By CCE [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  | 75.00% |  |  |
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] |  |  |  |  |  |  |
Ownership percentage |  |  |  | 66.60% |  |  |
Number of casino licenses owned | item |  |  |  | 7 |  |  |
Number of casino licenses operating | item |  |  |  | 5 |  |  |
Century Bets! Inc. [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Owned by noncontrolling interest |  |  |  | 25.00% |  |  |
Hamilton Properties Ltd. [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Number of slot machines | item |  |  |  | 200 |  |  |
Number of table games | item |  |  |  | 17 |  |  |
Number of electronic table games | item |  |  |  | 1 |  |  |
Loan for purchase of equipment |  |  |  | $ 5,000,000 |  |  |
Century Casinos Europe GmbH [Member] | Percentage Of Century Downs Racetrack Owned By Century Casinos Europe [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  | 75.00% |  |  |
Oceania Cruises [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Term of consulting agreement |  |  |  |  | 2 years |  |
Consulting Fee |  |  |  |  | $ 2,000,000 |  |
Consulting Fee payable per quarter |  |  |  |  | $ 250,000 |  |
Golden Hospitality Ltd. [Member] | Century Resorts Management [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  | 51.00% |  |  |
Total consideration |  |  | $ 600,000 |  |  |  |
BMO Credit Agreement [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Approved borrowing capacity | $ 35.0 | $ 26,600,000 |  |  |  |  |
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% |  |  |
Minh Chau Ltd. [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Equity investment |  |  |  | $ 3,600,000 |  |  |
Minh Chau Ltd. [Member] | Golden Hospitality Ltd. [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Ownership interest |  |  |  | 6.36% |  |  |
Number of electronic table games | item |  |  |  | 7 |  |  |
Feet from border station | ft |  |  |  | 300 |  |  |
Equity investment |  |  | 400,000 |  |  |  |
Period of option to purchase additional equity interest |  |  |  | 3 years |  |  |
Assets recognized |  |  | 500,000 |  |  |  |
Liabilities assumed |  |  | 100,000 |  |  |  |
Cash acquired |  |  | $ 200,000 |  |  |  |
Value of agreement recorded in deposits and other |  |  |  | $ 100,000 |  |  |
Number of rooms | item |  |  |  | 30 |  |  |
Minh Chau Ltd. [Member] | Golden Hospitality Ltd. [Member] | Maximum [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Number of electronic table games | item |  |  |  | 26 |  |  |
Minh Chau Ltd. [Member] | Golden Hospitality Ltd. [Member] | Future Invesment [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  | 51.00% |  |  |
Equity investment |  |  |  | $ 3,600,000 |  |  |
Minh Chau Ltd. [Member] | Golden Hospitality Ltd. [Member] | Option to Purchase [Member] |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |
Ownership percentage |  |  |  | 70.00% |  |  |
Additional interest to purchase under option, percentage |  |  |  | 19.00% |  |  |

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