Derivative Financial Instruments - Income Statement Location And Impact Of Derivative Financial Instruments (Detail) (Derivatives Not Designated As Hedging Instruments, Foreign Exchange Contract, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Derivatives Not Designated As Hedging Instruments | Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Currency exchange loss (gains), net	$ 2,002	$ (755)