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Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Significant Accounting Policies [Line Items] |  |  |  |
Outstanding balance of promotional balance liability |  | $ 700 | $ 700 |
Restricted cash |  |  | 1,023 |
Estimated cost of promotional allowances | [1],[2] |  | 10,386 | $ 8,943
Impairment of long-lived assets |  | 0 |  |
Contract assets |  | 0 | 0 |
Impairment losses on receivables and contract liabilities |  | 0 | 0 |
Advertising costs |  | $ 2,200 | $ 2,100 | $ 2,000
US Federal income tax statutory rate |  | 21.00% | 35.00% | 34.00%
Hotel, Food And Beverage [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Estimated cost of promotional allowances |  | $ 1,200 |  |
Tax Act [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
US Federal income tax statutory rate |  | 21.00% |  |
Casinos Poland's LIM Center [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Impairment of Leasehold |  |  | $ 100 |
Casinos Poland's Katowice Casino [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Impairment of Leasehold |  |  |  | $ 400
Included In Deposits And Other [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash |  | $ 709 | 744 |
Included In Deposits And Other [Member] | Century Casino Bath [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash |  | 600 |  |
Deposits Related To Payments Of Prizes and Giveaways [Member] | Casinos Poland [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash |  | 100 |  |
Opening [Member] |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Contract liability |  | $ 235 | $ 232 |
[1] | See Note 2, "Significant Accounting Policies," of the consolidated financial statements for a discussion of the impact of the adoption of ASU 2014-09 on the presentation of promotional allowances.
[2] | With the adoption of ASU 2014-09, promotional allowances are presented as a reduction in gaming revenue for the year ended December 31, 2018.

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