SEGMENT DATA Total Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Assets	[1]	$ 1,420,280	$ 1,390,717
BULGARIA [Member]
Segment Reporting Information [Line Items]
Assets		134,424	130,873
CROATIA [Member]
Segment Reporting Information [Line Items]
Assets		51,771	49,135
CZECH REPUBLIC [Member]
Segment Reporting Information [Line Items]
Assets		718,841	700,190
ROMANIA [Member]
Segment Reporting Information [Line Items]
Assets		279,157	266,132
SLOVAK REPUBLIC [Member]
Segment Reporting Information [Line Items]
Assets		131,790	131,220
SLOVENIA [Member]
Segment Reporting Information [Line Items]
Assets		71,784	72,381
Operating Segments [Member]
Segment Reporting Information [Line Items]
Assets	[1]	1,387,767	1,349,931
Corporate [Member]
Segment Reporting Information [Line Items]
Assets		$ 32,513	$ 40,786

[1] (1) Segment assets exclude any intercompany balances.