Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of Foreign Currency Forward Which Were Not Designated as Hedging Instruments (Detail)

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Fair Value Measurements and Derivatives - Effects of Foreign Currency Forward Which Were Not Designated as Hedging Instruments (Detail) (Not Designated as Hedging Instrument, Foreign Exchange Forward, USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Not Designated as Hedging Instrument | Foreign Exchange Forward
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain recognized in other income (expense)          $ 20