SEGMENT DATA Net Revenue and OIBDA (Details) $ in Thousands		3 Months Ended							12 Months Ended
		Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) operatingsegments	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Net revenues		$ 196,154	$ 119,431	$ 146,895	$ 111,732	$ 107,527	$ 142,803	$ 105,817	$ 574,212	$ 526,174	$ 496,195
BULGARIA
Segment Reporting Information [Line Items]
Net revenues									77,341	72,651	73,090
CZECH REPUBLIC
Segment Reporting Information [Line Items]
Net revenues									209,041	190,372	182,636
ROMANIA
Segment Reporting Information [Line Items]
Net revenues									191,244	172,951	157,578
Slovak Republic [Member]
Segment Reporting Information [Line Items]
Net revenues									$ 97,721	90,549	84,434
Total operating segments [Member]
Segment Reporting Information [Line Items]
Number of Operating Segments | operatingsegments									4
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]								$ (1,135)	$ (349)	$ (1,543)

[1] (1) Reflects revenues earned from the sale of content to other country segments in CME Ltd. All other revenues are third party revenues.