GOODWILL AND INTANGIBLE ASSETS - NET (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill		$ 109,289	$ 115,930	$ 57,417
Goodwill impairment charge		0	0	(2,241)
North America
Goodwill [Line Items]
Goodwill		76,812	81,464	31,078
Accumulated impairment loss		0	0	0
Europe
Goodwill [Line Items]
Goodwill		32,477	34,466	26,339
Accumulated impairment loss		0	0	0
Russia
Goodwill [Line Items]
Goodwill		0	0
Goodwill impairment charge				(2,241)
Accumulated impairment loss		2,241	2,241	2,241
Other
Goodwill [Line Items]
Goodwill		0	0
Goodwill impairment charge	$ (1,697)
Accumulated impairment loss		$ 1,697	$ 1,697	$ 1,697