GOODWILL AND INTANGIBLE ASSETS Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill	$ 639,073	$ 622,243
Gross Balance, December 31, 2015	1,095,309
Accumulated Impairment Losses, Beginning Balance	(473,066)
Foreign Currency	16,830
Accumulated Impairment Losses, Ending Balance	(473,066)
Gross Balance, September 30, 2016	1,112,139
BULGARIA [Member]
Goodwill [Roll Forward]
Goodwill	28,322	27,726
Gross Balance, December 31, 2015	172,365
Accumulated Impairment Losses, Beginning Balance	(144,639)
Foreign Currency	596
Accumulated Impairment Losses, Ending Balance	(144,639)
Gross Balance, September 30, 2016	172,961
CROATIA [Member]
Goodwill [Roll Forward]
Goodwill	575	551
Gross Balance, December 31, 2015	11,005
Accumulated Impairment Losses, Beginning Balance	(10,454)
Foreign Currency	24
Accumulated Impairment Losses, Ending Balance	(10,454)
Gross Balance, September 30, 2016	11,029
CZECH REPUBLIC [Member]
Goodwill [Roll Forward]
Goodwill	483,907	471,946
Gross Balance, December 31, 2015	759,491
Accumulated Impairment Losses, Beginning Balance	(287,545)
Foreign Currency	11,961
Accumulated Impairment Losses, Ending Balance	(287,545)
Gross Balance, September 30, 2016	771,452
ROMANIA [Member]
Goodwill [Roll Forward]
Goodwill	77,463	74,415
Gross Balance, December 31, 2015	85,443
Accumulated Impairment Losses, Beginning Balance	(11,028)
Foreign Currency	3,048
Accumulated Impairment Losses, Ending Balance	(11,028)
Gross Balance, September 30, 2016	88,491
SLOVAK REPUBLIC [Member]
Goodwill [Roll Forward]
Goodwill	48,806	47,605
Gross Balance, December 31, 2015	47,605
Accumulated Impairment Losses, Beginning Balance	0
Foreign Currency	1,201
Accumulated Impairment Losses, Ending Balance	0
Gross Balance, September 30, 2016	48,806
SLOVENIA [Member]
Goodwill [Roll Forward]
Goodwill	0	$ 0
Gross Balance, December 31, 2015	19,400
Accumulated Impairment Losses, Beginning Balance	(19,400)
Foreign Currency	0
Accumulated Impairment Losses, Ending Balance	(19,400)
Gross Balance, September 30, 2016	$ 19,400

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a,h)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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