Segment Information (Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net operating revenue	$ 37,875	$ 31,555	$ 68,279	$ 60,665
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	6,597	156	8,442	667
Income tax (benefit)	(406)	433	29	648
Depreciation and amortization	1,890	1,960	3,702	3,770
Non-controlling interests	1,022	(872)	674	(1,156)
Non-cash stock-based compensation			807	43
Gain (loss) on foreign currency transactions and other	(407)	(45)	(902)	(175)
Current assets	34,597		34,597		$ 30,163
Total Assets	194,744		194,744		187,467
Property and equipment, net	137,412		137,412		$ 134,627
Century Casinos [Member]
Segment Reporting Information [Line Items]
Net operating revenue	37,875	31,555	68,279	60,665
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	6,597	156	8,442	667
Interest expense (income), net	1,033	650	1,697	1,321
Income tax (benefit)	(406)	433	29	648
Depreciation and amortization	1,890	1,960	3,702	3,770
Non-controlling interests	1,022	(872)	674	(1,156)
Non-cash stock-based compensation	419	21	807	43
Gain (loss) on foreign currency transactions and other	(407)	(45)	(902)	(175)
Loss on disposition of fixed assets	25	741	146	800
Acquisition costs	0	0	0	0
Preopening expenses	0	0	345	0
Other one-time (income)	(3,365)	110	(3,365)	7
Adjusted EBITDA	6,808	3,154	11,575	5,925
Canada [Member]
Segment Reporting Information [Line Items]
Income tax (benefit)			515	706
Canada [Member] | Century Casinos [Member]
Segment Reporting Information [Line Items]
Net operating revenue	13,309	8,708	21,754	17,271
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	2,258	1,430	4,392	2,908
Interest expense (income), net	992	596	1,625	1,186
Income tax (benefit)	611	632	957	1,012
Depreciation and amortization	573	490	992	945
Non-controlling interests	738	(698)	(1)	(998)
Non-cash stock-based compensation	0	0	0	0
Gain (loss) on foreign currency transactions and other	(357)	26	(519)	(22)
Loss on disposition of fixed assets	3	0	3	0
Acquisition costs	(36)	0	0	0
Preopening expenses	0	0	345	0
Other one-time (income)	0	0	0	(103)
Adjusted EBITDA	4,782	2,476	7,794	4,928
United States [Member]
Segment Reporting Information [Line Items]
Income tax (benefit)			107	30
United States [Member] | Century Casinos [Member]
Segment Reporting Information [Line Items]
Net operating revenue	7,210	6,740	14,003	13,201
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	718	392	1,194	601
Interest expense (income), net	0	0	0	0
Income tax (benefit)	362	233	731	369
Depreciation and amortization	632	594	1,266	1,128
Non-controlling interests	0	0	0	0
Non-cash stock-based compensation	0	0	0	0
Gain (loss) on foreign currency transactions and other	0	0	0	0
Loss on disposition of fixed assets	0	1	0	1
Acquisition costs	0	0	0	0
Preopening expenses	0	0	0	0
Other one-time (income)	0	0	0	0
Adjusted EBITDA	1,712	1,220	3,191	2,099
Poland [Member]
Segment Reporting Information [Line Items]
Income tax (benefit)			519	(90)
Poland [Member] | Century Casinos [Member]
Segment Reporting Information [Line Items]
Net operating revenue	12,875	14,248	26,409	26,661
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	568	(348)	1,351	(317)
Interest expense (income), net	43	67	78	162
Income tax (benefit)	268	(71)	516	(91)
Depreciation and amortization	636	723	1,247	1,416
Non-controlling interests	284	(174)	675	(158)
Non-cash stock-based compensation	0	0	0	0
Gain (loss) on foreign currency transactions and other	(35)	(68)	(368)	(164)
Loss on disposition of fixed assets	22	737	142	796
Acquisition costs	0	0	0	0
Preopening expenses	0	0	0	0
Other one-time (income)	0	110	0	110
Adjusted EBITDA	1,786	976	3,641	1,754
Corporate and Other [Member] | Century Casinos [Member]
Segment Reporting Information [Line Items]
Net operating revenue	4,481	1,859	6,113	3,532
Net earnings (loss) attributable to Century Casinos, Inc. shareholders	3,053	(1,318)	1,505	(2,525)
Interest expense (income), net	(2)	(13)	(6)	(27)
Income tax (benefit)	(1,647)	(361)	(2,175)	(642)
Depreciation and amortization	49	153	197	281
Non-controlling interests	0	0	0	0
Non-cash stock-based compensation	419	21	807	43
Gain (loss) on foreign currency transactions and other	(15)	(3)	(15)	11
Loss on disposition of fixed assets	0	3	1	3
Acquisition costs	36	0	0	0
Preopening expenses	0	0	0	0
Other one-time (income)	(3,365)	0	(3,365)	0
Adjusted EBITDA	$ (1,472)	$ (1,518)	$ (3,051)	$ (2,856)