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Apex Acquisition (Schedule of Unaudited Pro Forma Information) (Details) - Apex Acquisition[Member] - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |  |
Net operating revenue | $ 145,186 | $ 143,152 | $ 129,594
Net earnings attributable to Century Casinos, Inc. shareholders | $ 10,197 | $ 13,103 | $ 2,621
Basic and diluted earnings per share | $ 0.41 | $ 0.52 | $ 0.11

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