FAIR VALUE MEASUREMENTS - Changes to Contingent Consideration (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Fair Value Disclosures [Abstract]
Contingent consideration, beginning balance	$ 18,511
Increases due to acquisitions	955
Decrease due to payments	(3,415)
Changes due to currency fluctuations	(244)
Contingent consideration, ending balance	$ 15,807

Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

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