Annual report pursuant to Section 13 and 15(d)

Effects of Foreign Currency Collar Designated as Cash Flow Hedges (Detail)

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Effects of Foreign Currency Collar Designated as Cash Flow Hedges (Detail) (Cash Flow Hedging, Foreign Currency Collar, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Cash Flow Hedging | Foreign Currency Collar
   
Derivative Instruments, Gain (Loss) [Line Items]    
Gain recognized in other comprehensive income (loss) - effective portion $ 4,350 $ 8,152