GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill by Reportable Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill gross value			$ 388,113
Accumulated impairment losses			(92,423)
Goodwill [Roll Forward]
Goodwill at beginning of period	297,773	295,690
Impact of currency fluctuations	(3,132)	2,083
Acquisitions	46,741
Goodwill at end of period	341,382	297,773
North America
Goodwill [Line Items]
Goodwill gross value			363,953
Accumulated impairment losses			(92,423)
Goodwill [Roll Forward]
Goodwill at beginning of period	272,140	271,530
Impact of currency fluctuations	(1,455)	610
Acquisitions	15,049
Goodwill at end of period	285,734	272,140
Europe
Goodwill [Line Items]
Goodwill gross value			18,856
Accumulated impairment losses			0
Goodwill [Roll Forward]
Goodwill at beginning of period	20,216	18,856
Impact of currency fluctuations	(953)	1,360
Acquisitions	29,941
Goodwill at end of period	49,204	20,216
Asia Pacific
Goodwill [Line Items]
Goodwill gross value			5,304
Accumulated impairment losses			0
Goodwill [Roll Forward]
Goodwill at beginning of period	5,417	5,304
Impact of currency fluctuations	(724)	113
Acquisitions	1,751
Goodwill at end of period	$ 6,444	$ 5,417