GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill by Reportable Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill gross value		$ 478,839us-gaap_GoodwillGross
Accumulated impairment losses	(92,423)
Goodwill [Roll Forward]
Carrying value	386,416us-gaap_Goodwill
Acquisitions	34,679us-gaap_GoodwillAcquiredDuringPeriod
Adjustments to prior acquisitions	(25)
Impact of currency fluctuations	(5,657)us-gaap_GoodwillTranslationAdjustments
Carrying value	415,413us-gaap_Goodwill
North America
Goodwill [Line Items]
Goodwill gross value		428,511
Accumulated impairment losses	(92,423)
Goodwill [Roll Forward]
Carrying value	336,088
Acquisitions	2,292
Adjustments to prior acquisitions	(25)
Impact of currency fluctuations	(1,729)
Carrying value	336,626
Europe
Goodwill [Line Items]
Goodwill gross value		44,433
Accumulated impairment losses	0
Goodwill [Roll Forward]
Carrying value	44,433
Acquisitions	32,210
Adjustments to prior acquisitions	0
Impact of currency fluctuations	(3,580)
Carrying value	73,063
Asia Pacific
Goodwill [Line Items]
Goodwill gross value		5,895
Accumulated impairment losses	0
Goodwill [Roll Forward]
Carrying value	5,895
Acquisitions	177
Adjustments to prior acquisitions	0
Impact of currency fluctuations	(348)
Carrying value	$ 5,724

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

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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

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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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