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Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash |  | $ 974 |  | $ 974
Estimated cost of promotional allowances |  | 2,571 |  | 5,013
Duration in which payments for management and consulting services fees are typically due |  |  | 30 days |
Impairment on receivables and contract liabilities |  |  | $ 0 |
Contract Liabilitiy | $ 200 | 200 | 200 | 200
Hotel, Food And Beverage [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Estimated cost of promotional allowances | 300 |  | $ 600 |
Maximum [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Duration of Company's contracts and contract liabilities |  |  | 1 year |
Expected duration of performace obligation |  |  | 1 year |
Included In Deposits And Other [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash | 726 | $ 177 | $ 726 | $ 177
Included In Deposits And Other [Member] | Century Casino Bath [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash | 600 |  | 600 |
Deposits Related To Payments Of Prizes and Giveaways [Member] | Casinos Poland Ltd [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash | $ 100 |  | $ 100 |

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