GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill by Reportable Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill gross value		$ 433,805
Accumulated impairment losses	(92,423)
Goodwill [Roll Forward]
Carrying value at	341,382
Acquisitions	31,868
Adjustments to prior acquisitions	(945)
Impact of currency fluctuations	(3,054)
Carrying value at	369,251
North America
Goodwill [Line Items]
Goodwill gross value		378,157
Accumulated impairment losses	(92,423)
Goodwill [Roll Forward]
Carrying value at	285,734
Acquisitions	30,936
Adjustments to prior acquisitions	(625)
Impact of currency fluctuations	(1,118)
Carrying value at	314,927
Europe
Goodwill [Line Items]
Goodwill gross value		49,204
Accumulated impairment losses	0
Goodwill [Roll Forward]
Carrying value at	49,204
Acquisitions	932
Adjustments to prior acquisitions	(225)
Impact of currency fluctuations	(1,840)
Carrying value at	48,071
Asia Pacific
Goodwill [Line Items]
Goodwill gross value		6,444
Accumulated impairment losses	0
Goodwill [Roll Forward]
Carrying value at	6,444
Acquisitions	0
Adjustments to prior acquisitions	(95)
Impact of currency fluctuations	(96)
Carrying value at	$ 6,253

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 of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-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

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