FAIR VALUE MEASUREMENTS - Changes to Contingent Consideration (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Business Combination, Contingent Consideration, Liability [Roll Forward]
Contingent consideration at December 31, 2014	$ 19,941
Increases due to acquisitions	12,945	$ 16,495
Decrease due to payments	(1,444)
Changes due to foreign currency fluctuations	(4,967)
Changes in fair value reflected in Selling, general, and administrative expenses	(640)	$ 3,953
Contingent consideration at September 30, 2015	$ 25,835