FAIR VALUE MEASUREMENTS - Changes to Contingent Consideration (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Business Combination, Contingent Consideration, Liability [Roll Forward]
Contingent consideration at December 31, 2014	$ 19,941
Increases due to acquisitions	10,867	$ 15,810
Decrease due to payments	(984)
Changes due to foreign currency fluctuations	(2,294)
Changes in fair value reflected in Selling, general, and administrative expenses	(640)	$ 3,953
Contingent consideration at June 30, 2015	$ 26,890