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Description Of Business And Basis Of Presentation (Narrative) (Details) $ in Thousands, $ in Millions |  | 1 Months Ended | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 05, 2020 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2021 USD ($) item | Mar. 31, 2021 CAD ($) item | May 31, 2021 item | Dec. 31, 2020 USD ($) | Aug. 05, 2020 CAD ($) | Dec. 06, 2019 USD ($) | Oct. 31, 2014
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Number of ship-based casinos | item |  |  | 4 |  |  |  |  |  |
Assets held for sale |  |  | $ 8,374 |  |  | $ 8,271 |  |  |
Restricted cash |  | $ 831 | 268 |  |  |  |  |  |
Canada And Poland [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Estimates amount to reopen operations and cover short-term cash |  |  | $ 7,000 |  |  |  |  |  |
UniCredit Bank Austria [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount drew |  | 7,400 |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Number of ship based casinos, ended | item |  |  |  |  | 3 |  |  |  |
Number of ship based casinos, operating | item |  |  |  |  | 1 |  |  |  |
Lot Polish Airlines Invesment [Member] | Polish Airports Company [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Ownership interest by non-controlling |  |  | 33.30% |  |  |  |  |  |
Casinos Poland [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Ownership percentage |  |  | 66.60% |  |  |  |  |  |
Number of casinos owned | item |  |  | 8 | 8 |  |  |  |  |
Mendoza Central Entretenimientos S. A. [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Impairment intangible assets |  | 1,000 |  |  |  |  |  |  |
Wrote-down receivable |  | 300 |  |  |  |  |  |  |
Century Resorts Management GmbH [Member] | Mendoza Central Entretenimientos S. A. [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Ownership interest |  |  | 7.50% |  |  |  |  |  | 7.50%
Century Resorts Management 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% |  |  |  |  |  |
Macquarie Capital [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Revolving credit facility, amount drew |  | 9,950 |  |  |  |  |  |  |
Credit facility amount |  |  | $ 10,000 |  |  |  |  | $ 10,000 |
Macquarie Capital [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility |  |  | 50 |  |  |  |  |  |
Century Sports [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Lease term | 3 years |  |  |  |  |  | 3 years |  |
Annual net rent |  |  | $ 400 | $ 0.5 |  |  |  |  |
Century Downs Racetrack And Casino [Member] | Unaffiliated Shareholders [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Ownership interest by non-controlling |  |  | 25.00% |  |  |  |  |  |
Deposits And Other Related To A Cash Guarantee [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Restricted cash |  | 600 |  |  |  |  |  |  |
Deposits And Other Related To Payments Of Prizes And Giveaways [Member] | Casinos Poland [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Restricted cash |  | 200 | $ 200 |  |  |  |  |  |
Deposits And Other Related To Insurance Policy [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Restricted cash |  | $ 100 | 100 |  |  |  |  |  |
Century Casino Calgary [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Amount, sell casino operation | $ 7,500 |  |  |  |  |  | $ 10.0 |  |
Quarterly earn out period | 3 years |  |  |  |  |  |  |  |
Working capital |  |  | 100 | $ 0.1 |  |  |  |  |
Century Casino Calgary [Member] | Land [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Assets held for sale |  |  | 4,800 |  |  |  |  |  |
Century Casino Calgary [Member] | Buildings And Improvements [Member] |  |  |  |  |  |  |  |  |
Description Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |  |  |  |
Assets held for sale |  |  | $ 3,600 |  |  |  |  |  |

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