GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Beginning Balance	$ 2,231,582us-gaap_Goodwill	$ 2,065,103us-gaap_Goodwill
Goodwill acquired during year	258,017us-gaap_GoodwillAcquiredDuringPeriod	173,784us-gaap_GoodwillAcquiredDuringPeriod
Purchase accounting allocation adjustments	(22,420)	6,011
Changes due to foreign currency fluctuations	(48,347)	(13,316)
Ending Balance	2,418,832us-gaap_Goodwill	2,231,582us-gaap_Goodwill
United States
Goodwill [Roll Forward]
Beginning Balance	1,678,077	1,616,286
Goodwill acquired during year	169,754	57,250
Purchase accounting allocation adjustments	(4,825)	4,541
Changes due to foreign currency fluctuations	0	0
Ending Balance	1,843,006	1,678,077
International [Member]
Goodwill [Roll Forward]
Beginning Balance	553,505	448,817
Goodwill acquired during year	88,263	116,534
Purchase accounting allocation adjustments	(17,595)	1,470
Changes due to foreign currency fluctuations	(48,347)	(13,316)
Ending Balance	$ 575,826	$ 553,505

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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