GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Beginning Balance	$ 2,065,103	$ 1,913,703
Goodwill acquired during year	148,880	177,076
Goodwill allocation adjustments	4,602	(29,920)
Sale of business		(1,178)
Changes due to currency fluctuation	(10,740)	5,422
Ending Balance	2,207,845	2,065,103
United States
Goodwill [Roll Forward]
Beginning Balance	1,616,286	1,506,416
Goodwill acquired during year	58,260	114,931
Goodwill allocation adjustments	4,515	(5,061)
Sale of business		0
Changes due to currency fluctuation	0	0
Ending Balance	1,679,061	1,616,286
International
Goodwill [Roll Forward]
Beginning Balance	448,817	407,287
Goodwill acquired during year	90,620	62,145
Goodwill allocation adjustments	87	(24,859)
Sale of business		(1,178)
Changes due to currency fluctuation	(10,740)	5,422
Ending Balance	$ 528,784	$ 448,817