SEGMENT DATA Total Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Assets	[1]	$ 1,447,862	$ 1,488,361
BULGARIA
Segment Reporting Information [Line Items]
Assets	[1]	135,593	142,165
CZECH REPUBLIC
Segment Reporting Information [Line Items]
Assets	[1]	758,479	771,286
ROMANIA
Segment Reporting Information [Line Items]
Assets	[1]	289,968	297,937
Slovak Republic [Member]
Segment Reporting Information [Line Items]
Assets	[1]	150,806	146,252
SLOVENIA
Segment Reporting Information [Line Items]
Assets	[1]	92,144	89,440
Total operating segments
Segment Reporting Information [Line Items]
Assets	[1]	1,426,990	1,447,080
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	[1]	$ 20,872	$ 41,281

[1] Segment assets exclude any intercompany balances.