Accumulated Other Comprehensive Loss - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	$ 128,359,000	$ 118,877,000	$ 243,331,000	$ 219,044,000
Provision for income taxes	45,083,000	41,702,000	84,576,000	56,907,000
Foreign currency gains (losses) related to net investment hedges included in foreign currency translation component of accumulated other comprehensive loss	21,300,000		24,600,000
Foreign currency gains (losses) related to net investment hedges included in foreign currency translation component of accumulated other comprehensive loss, income tax (benefit) provision	8,000,000		9,200,000
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrecognized Net Defined Benefit Plan Costs [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	400,000		900,000
Provision for income taxes	200,000		400,000
Net prior service credit arising during period, before tax	500,000		1,300,000
Amortization of net actuarial losses	100,000		400,000
Reclassification out of Accumulated Other Comprehensive Income [Member] | Change in Fair Value of Derivatives [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(1,800,000)		(4,900,000)
Provision for income taxes	$ (700,000)		$ (2,000,000)