Derivative Instruments (Additional Information) (Detail) $ in Thousands, € in Millions	3 Months Ended		24 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2011 USD ($) instrument	Mar. 31, 2017 EUR (€) instrument
Derivative [Line Items]
Amortization of interest expense	$ 329	$ 378
Amount to be recognized from hedged transactions within 12 months, approximate	6,600
Other (Income) Expense Net
Derivative [Line Items]
Gain on derivatives	$ 400
4.2% Senior Notes, due December 2021
Derivative [Line Items]
Interest rate on senior notes			4.20%
4.5% Senior Notes, due December 2020
Derivative [Line Items]
Interest rate on senior notes			4.50%
Interest Rate Contract
Derivative [Line Items]
Number of instruments held | instrument			2
Interest Rate Exchange Agreement Expiring 2010 and 2011
Derivative [Line Items]
Amortization of interest expense			$ 68,900
Term of amortized interest expense, years			10 years
Foreign Currency Forward Contracts
Derivative [Line Items]
Number of instruments held | instrument				4
Notional amount | €				€ 180