Goodwill and Other Intangible Assets - Summary of Changes in Goodwill by Reportable Business Segment (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 1,552,725
Acquisition Accounting Adjustments	16,042
Foreign Currency	(11,756)
Goodwill, Ending Balance	1,557,011
North America [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	366,594
Acquisition Accounting Adjustments	19,966
Goodwill, Ending Balance	386,560
International [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	1,186,131
Acquisition Accounting Adjustments	(3,924)
Foreign Currency	(11,756)
Goodwill, Ending Balance	$ 1,170,451