SEGMENT DATA Capital Expenditure (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Capital expenditures	$ 8,759	$ 8,272
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	36	178
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	8,723	8,094
Operating Segments | Bulgaria
Segment Reporting Information [Line Items]
Capital expenditures	1,518	1,635
Operating Segments | Czech Republic
Segment Reporting Information [Line Items]
Capital expenditures	3,608	3,072
Operating Segments | Romania
Segment Reporting Information [Line Items]
Capital expenditures	1,483	1,033
Operating Segments | Slovak Republic
Segment Reporting Information [Line Items]
Capital expenditures	720	442
Operating Segments | Slovenia
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,394	$ 1,912