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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Income Taxes [Line Items]
Look-back period	3 years
Worldwide effective tax rate	16.00%
United States [Member]
Income Taxes [Line Items]
Valuation allowance	5.0
Calgary [Member]
Income Taxes [Line Items]
Valuation allowance	0.9
Century Casinos Europe GmbH [Member]
Income Taxes [Line Items]
Valuation allowance	0.9
Canada [Member]
Income Taxes [Line Items]
Statutory tax rate	25.00%

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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