GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning Balance	$ 2,418,832	$ 2,231,582
Goodwill acquired during year	57,811	258,017
Purchase accounting allocation adjustments	(1,356)	(22,420)
Goodwill other changes	(440)
Changes due to foreign currency fluctuations	(20,755)	(48,347)
Ending Balance	2,454,092	2,418,832
United States
Goodwill [Roll Forward]
Beginning Balance	1,834,315	1,671,723
Goodwill acquired during year	33,369	169,754
Purchase accounting allocation adjustments	(956)	(4,825)
Goodwill other changes	0
Changes due to foreign currency fluctuations	(1,913)	(2,337)
Ending Balance	1,864,815	1,834,315
International
Goodwill [Roll Forward]
Beginning Balance	584,517	559,859
Goodwill acquired during year	24,442	88,263
Purchase accounting allocation adjustments	(400)	(17,595)
Goodwill other changes	(440)
Changes due to foreign currency fluctuations	(18,842)	(46,010)
Ending Balance	$ 589,277	$ 584,517