SEGMENT DATA Long Lived Assets (Details) - USD ($) $ in Thousands		Jun. 30, 2017		Dec. 31, 2016		Jun. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Long-lived assets		$ 115,982	[1]	$ 109,089	[1]	$ 105,644	$ 108,522
BULGARIA [Member]
Segment Reporting Information [Line Items]
Long-lived assets		6,691		6,280
CROATIA [Member]
Segment Reporting Information [Line Items]
Long-lived assets		5,926		5,832
CZECH REPUBLIC [Member]
Segment Reporting Information [Line Items]
Long-lived assets		42,199		39,529
ROMANIA [Member]
Segment Reporting Information [Line Items]
Long-lived assets		25,114		22,796
SLOVAK REPUBLIC [Member]
Segment Reporting Information [Line Items]
Long-lived assets		16,967		15,326
SLOVENIA [Member]
Segment Reporting Information [Line Items]
Long-lived assets		14,397		14,177
Operating Segments [Member]
Segment Reporting Information [Line Items]
Long-lived assets	[1]	111,294		103,940
Corporate [Member]
Segment Reporting Information [Line Items]
Long-lived assets		$ 4,688		$ 5,149

[1] (1) Reflects property, plant and equipment.