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Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Significant Accounting Policies [Line Items]
Operating lease right-of-use assets		$ 37,040
Operating lease liability		47,177
Outstanding balance of promotional balance liability		1,400	$ 700
Impairment - intangible and tangible assets		16,486
Impairment of long-lived assets			0
Contract assets		$ 0	0
Initial lease term		14 years 4 months 24 days
Advertising costs		$ 3,400	$ 2,200	$ 2,100
US federal income tax statutory rate		21.00%	21.00%	35.00%
Tax Act [Member]
Significant Accounting Policies [Line Items]
US federal income tax statutory rate	21.00%
Accounting Standards Update 2016-02 [Member]
Significant Accounting Policies [Line Items]
Operating lease right-of-use assets					$ 38,300
Operating lease liability					$ 40,400
Cumulative-effect adjustment to retained earnings		$ 300
Casinos Poland's LIM Center [Member]
Significant Accounting Policies [Line Items]
Impairment of leasehold				$ 100
Century Casino Bath [Member]
Significant Accounting Policies [Line Items]
Impairment of leasehold		8,000
Included In Deposits And Other [Member]
Significant Accounting Policies [Line Items]
Restricted cash		886	$ 709
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		300
Deposits Related To Insurance Policy [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Restricted cash		100
Opening [Member]
Significant Accounting Policies [Line Items]
Contract liability		219	$ 235
Casino Licenses [Member] | Century Casino Bath [Member]
Significant Accounting Policies [Line Items]
Impairment - intangible and tangible assets		$ 1,200

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Contract Assets Related To Receivables From Customers

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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