SEGMENT DATA Total Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Assets	[1]	$ 1,488,361	$ 1,628,055
BULGARIA
Segment Reporting Information [Line Items]
Assets	[1]	142,165	155,885
CZECH REPUBLIC
Segment Reporting Information [Line Items]
Assets	[1]	771,286	842,716
ROMANIA
Segment Reporting Information [Line Items]
Assets	[1]	297,937	307,286
Slovak Republic [Member]
Segment Reporting Information [Line Items]
Assets	[1]	146,252	149,866
SLOVENIA
Segment Reporting Information [Line Items]
Assets	[1]	89,440	88,158
Total operating segments [Member]
Segment Reporting Information [Line Items]
Assets	[1]	1,447,080	1,543,911
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	[1]	$ 41,281	$ 24,451

[1] Segment assets exclude any intercompany balances.