Financial Instruments - Derivative Instruments Measured at Fair Value (Detail) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]	$ 15,506	$ 21,837
Total Fair Value, Derivative Liabilities	[2]	12,562	2,980
Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]	15,506	21,502
Total Fair Value, Derivative Liabilities	[2]	11,958	2,255
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]		335
Total Fair Value, Derivative Liabilities		604	725
Fair Value of Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]	1,171	14,100
Total Fair Value, Derivative Liabilities	[2]	10,546	771
Fair Value of Derivatives Designated as Hedging Instruments [Member] | Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]	1,171	13,765
Total Fair Value, Derivative Liabilities	[2]	9,942	46
Fair Value of Derivatives Designated as Hedging Instruments [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]		335
Total Fair Value, Derivative Liabilities		604	725
Fair Value of Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]	14,335	7,737
Total Fair Value, Derivative Liabilities	[2]	2,016	2,209
Fair Value of Derivatives Not Designated as Hedging Instruments [Member] | Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]	14,335	7,737
Total Fair Value, Derivative Liabilities	[2]	$ 2,016	2,209
Fair Value of Derivatives Not Designated as Hedging Instruments [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Total Fair Value, Derivative Assets	[1]		$ 0

[1] Derivative assets are recorded to Prepaid expenses and other current assets in the Consolidated Balance Sheet.

[2] Derivative liabilities are recorded as Other current liabilities in the Consolidated Balance Sheet.