GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill by Reportable Business Segment) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill gross value		$ 388,113
Accumulated impairment losses		(92,423)
Goodwill carrying value at December 31, 2011	295,690
Impact of currency fluctuations	185
Goodwill carrying value at June 30, 2012	295,875
North America [Member]
Goodwill [Line Items]
Goodwill gross value		363,953
Accumulated impairment losses		(92,423)
Goodwill carrying value at December 31, 2011	271,530
Impact of currency fluctuations	88
Goodwill carrying value at June 30, 2012	271,618
Europe [Member]
Goodwill [Line Items]
Goodwill gross value		18,856
Accumulated impairment losses
Goodwill carrying value at December 31, 2011	18,856
Impact of currency fluctuations	69
Goodwill carrying value at June 30, 2012	18,925
Asia Pacific [Member]
Goodwill [Line Items]
Goodwill gross value		5,304
Accumulated impairment losses
Goodwill carrying value at December 31, 2011	5,304
Impact of currency fluctuations	28
Goodwill carrying value at June 30, 2012	$ 5,332

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Name Statement of Financial Accounting Standard (FAS)

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-Number 141R

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