SEGMENT DATA Capital Expenditure (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Capital expenditures	$ 4,790	$ 4,365
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	20	66
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	4,770	4,299
Operating Segments | Bulgaria
Segment Reporting Information [Line Items]
Capital expenditures	548	774
Operating Segments | Czech Republic
Segment Reporting Information [Line Items]
Capital expenditures	2,026	1,687
Operating Segments | Romania
Segment Reporting Information [Line Items]
Capital expenditures	650	417
Operating Segments | Slovak Republic
Segment Reporting Information [Line Items]
Capital expenditures	567	202
Operating Segments | Slovenia
Segment Reporting Information [Line Items]
Capital expenditures	$ 979	$ 1,219