GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill by Reportable Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Goodwill [Line Items]
Goodwill gross value	$ 433,805
Accumulated impairment losses	(92,423)
Goodwill carrying value at beginning of period	341,382
Adjustments to acquisitions	(787)
Impact of currency fluctuations	929
Goodwill carrying value at end of period	341,524
North America
Goodwill [Line Items]
Goodwill gross value	378,157
Accumulated impairment losses	(92,423)
Goodwill carrying value at beginning of period	285,734
Adjustments to acquisitions	(515)
Impact of currency fluctuations	(99)
Goodwill carrying value at end of period	285,120
Europe
Goodwill [Line Items]
Goodwill gross value	49,204
Accumulated impairment losses	0
Goodwill carrying value at beginning of period	49,204
Adjustments to acquisitions	(195)
Impact of currency fluctuations	739
Goodwill carrying value at end of period	49,748
Asia Pacific
Goodwill [Line Items]
Goodwill gross value	6,444
Accumulated impairment losses	0
Goodwill carrying value at beginning of period	6,444
Adjustments to acquisitions	(77)
Impact of currency fluctuations	289
Goodwill carrying value at end of period	$ 6,656