Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Percentage of net win retained by Alberta Gaming and Liquor Commission	85.00%
Percentage of net win retained by Alberta Gaming and Liquor Commission which is allocated to licensed charities	15.00%
Percentage of casino net win allocated to charities for table games excluding poker and craps	50.00%
Percentage of casino net win allocated to charities for poker and craps	25.00%
Advertising costs	$ 1.6	$ 1.6
Deferred tax asset resulting from net operating losses in the U.S.	2.6
Deferred tax asset resulting from Calgary Casino purchase	0.9
Deferred tax asset resulting from Century Casinos Europe subsidiary	$ 0.9
Casinos Poland Ltd [Member]
Ownership percentage	33.30%
Number of persons on management board	3
Number of persons on supervisory board	3
Maximum [Member]
Ownership percentage	50.00%
Minimum [Member]
Ownership percentage	20.00%

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Percentage of casino net win allocated to charities for poker and craps

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Percentage of casino net win allocated to charities for table games excluding poker and craps.

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Percentage of net win retained by government agency.

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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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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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