Derivative Instruments and Hedging Activities Carrying Values of Derivative Instruments (Detail) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Derivative Net Carrying Value		$ 875	$ 298
Designated as Hedging Instrument
Derivative [Line Items]
Derivative Net Carrying Value		875	298
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Derivative Net Carrying Value	[1]	875	298
Prepaid Expenses And Other Current Assets
Derivative [Line Items]
Fair Value— Assets		1,441	2,128
Prepaid Expenses And Other Current Assets | Designated as Hedging Instrument
Derivative [Line Items]
Fair Value— Assets		1,441	2,128
Prepaid Expenses And Other Current Assets | Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Fair Value— Assets	[1]	1,441	2,128
Other Current Liabilities
Derivative [Line Items]
Fair Value— (Liabilities)		(566)	(1,830)
Other Current Liabilities | Designated as Hedging Instrument
Derivative [Line Items]
Fair Value— (Liabilities)		(566)	(1,830)
Other Current Liabilities | Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Fair Value— (Liabilities)	[1]	$ (566)	$ (1,830)

[1] Assets are included in prepaid expenses and other and liabilities are included in other accrued expenses on the accompanying consolidated balance sheets.