SEGMENT DATA Capital Expenditure (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Capital expenditures	$ 15,639	$ 15,068
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	256	490
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	15,383	14,578
Operating Segments | Bulgaria
Segment Reporting Information [Line Items]
Capital expenditures	4,738	2,939
Operating Segments | Czech Republic
Segment Reporting Information [Line Items]
Capital expenditures	4,555	5,450
Operating Segments | Romania
Segment Reporting Information [Line Items]
Capital expenditures	2,234	2,009
Operating Segments | Slovak Republic
Segment Reporting Information [Line Items]
Capital expenditures	1,087	1,210
Operating Segments | SLOVENIA
Segment Reporting Information [Line Items]
Capital expenditures	$ 2,769	$ 2,970