SEGMENT DATA Long Lived Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Segment Reporting Information [Line Items]
Assets	[1]	$ 1,390,717		$ 1,440,417
Long-lived assets		109,089	[2]	108,522	[2]	$ 114,335
BULGARIA
Segment Reporting Information [Line Items]
Assets	[1]	130,873		134,418
Long-lived assets	[2]	6,280		5,602
CROATIA
Segment Reporting Information [Line Items]
Assets	[1]	49,135		52,306
Long-lived assets	[2]	5,832		5,497
CZECH REPUBLIC
Segment Reporting Information [Line Items]
Assets	[1]	700,190		746,269
Long-lived assets	[2]	39,529		39,907
ROMANIA
Segment Reporting Information [Line Items]
Assets	[1]	266,132		261,984
Long-lived assets	[2]	22,796		20,873
Slovak Republic [Member]
Segment Reporting Information [Line Items]
Assets	[1]	131,220		121,122
Long-lived assets	[2]	15,326		15,606
Slovenia [Member]
Segment Reporting Information [Line Items]
Assets	[1]	72,381		70,911
Long-lived assets	[2]	14,177		15,082
Total operating segments [Member]
Segment Reporting Information [Line Items]
Assets	[1]	1,349,931		1,387,010
Long-lived assets	[2]	103,940		102,567
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	[1]	40,786		53,407
Long-lived assets	[2]	$ 5,149		$ 5,955

[1] Segment assets exclude any intercompany balances.

[2] Reflects property, plant and equipment.