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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.