GOODWILL - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 118,615	$ 115,930
North America
Goodwill [Line Items]
Goodwill	83,493	81,464
Accumulated impairment loss	0	0
Europe
Goodwill [Line Items]
Goodwill	35,122	34,466
Accumulated impairment loss	0	0
Other
Goodwill [Line Items]
Accumulated impairment loss	1,697	1,697
Russia
Goodwill [Line Items]
Goodwill	0	0
Accumulated impairment loss	$ 2,241	$ 2,241