SEGMENT DATA Capital Expenditure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Capital expenditures	$ 29,567	$ 33,517	$ 28,685
BULGARIA
Segment Reporting Information [Line Items]
Capital expenditures	3,304	3,517	2,627
CROATIA
Segment Reporting Information [Line Items]
Capital expenditures	2,593	3,215	2,701
CZECH REPUBLIC
Segment Reporting Information [Line Items]
Capital expenditures	8,043	10,982	9,139
ROMANIA
Segment Reporting Information [Line Items]
Capital expenditures	6,863	5,794	4,686
Slovak Republic [Member]
Segment Reporting Information [Line Items]
Capital expenditures	1,693	2,921	2,240
Slovenia [Member]
Segment Reporting Information [Line Items]
Capital expenditures	4,128	3,197	3,502
Total operating segments [Member]
Segment Reporting Information [Line Items]
Capital expenditures	26,624	29,626	24,895
Corporate [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 2,943	$ 3,891	$ 3,790