Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Derivative Assets (Liabilities)	$ 3,698	$ 5,979
Stock Based Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Derivative Assets (Liabilities)	(18,057)	(19,079)
Quoted Prices in Active Markets for Identical Assets Level (1) [Member] | Stock Based Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Derivative Assets (Liabilities)	(18,057)	(19,079)
Significant Other Observable Inputs Level (2) [Member] | Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Derivative Assets (Liabilities)	$ 3,698	$ 5,979