Apex Acquisition (Narrative) (Details) $ in Thousands, CAD in Millions				1 Months Ended		3 Months Ended		5 Months Ended
		Oct. 01, 2016 CAD	Oct. 01, 2016 USD ($)	Feb. 28, 2017 CAD	Feb. 28, 2017 USD ($)	Mar. 31, 2017 USD ($) a ft² item	Mar. 31, 2016 USD ($)	Feb. 28, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Net operating revenue	[1]					$ 36,398	$ 33,227
Net earnings (loss) attributable to Century Casinos, Inc. shareholders						2,159	2,281
Assets						218,073			$ 217,838
Cash						39,743	$ 29,932		38,837	$ 29,366
Liabilities						$ 75,055			79,254
Apex Acquisition[Member]
Business Acquisition [Line Items]
Additional ownership acquired			100.00%
Square footage of casino facility | ft²						34,500
Number of live table games | item						7
Number of video lottery terminals | item						12
Number of slot machines | item						381
Acres of land | a						6
Number of guests that the banquet facility can accommodate | item						175
Total consideration		CAD 31.9	$ 24,300
Payments for acquisition		27.7	21,100					$ 24,289
Working capital paid				CAD 2.0	$ 1,500
Net operating revenue						$ 2,000
Net earnings (loss) attributable to Century Casinos, Inc. shareholders						100
Assets			22,400
Cash			3,100
Liabilities			1,700
Goodwill			3,600
Investment fair value			21,200
Acquisition costs						$ 100			$ 200
Purchase Agreement Holdbacks [Member] | Apex Acquisition[Member]
Business Acquisition [Line Items]
Payments for acquisition		CAD 2.2	$ 1,700

[1] Net operating revenue for Corporate and Other primarily relates to the Company's cruise ship operations.